A bit over due but here is the updated list.
1: 20th Century Limited, Karl R. Zimmermann, MBI
2: A Hill, a Branch, and the Pecksport Loop, John Taibi, Ontario & Western Railway Historical Society
3: Adirondack Railroads Real and Phantom, Harold K. Hochschild, Adirondack Museum
4: Adirondack Vistas, Ed Gardner, Author
5: Arcade & Attica Railroad, Edward A Lewis, The Baggage Car
6: Baltimore and Ohio Railroad Stations and Towers along the Niagara Division, William Fries , (1996)
7: Between the Ocean and the Lakes -The Story of the ERIE, Edward Harold Mott,
8: Bradford and Foster Brook Peg Leg Railroad , Lawrence Kilmer ,
9: Bridging the Hudson The Poughkeepsie Railroad Bridge and its Connecting Rail Lines, A Many-Faceted History, Carleton Mabee, Purple Mountain Press
10: Brooklyn's Waterfront Railways: A Pictorial Journey, Jay Bendersky, Meatball Productions
11: Buffalo & Susquehanna, Paul Pietrak,
12: Buffalo Central Terminal: A photo album, Ken Kraemer, RR Trax studios
13: Buffalo Central Terminal: construction of a Transportation Landmark, John Dahl, Railroad Station Historical Society
14: Buffalo, Rochester & Pittsburgh in Color (vol 1), M Zollitsch, Morning Sun Books
15:Buffalo, Rochester & Pittsburgh in Color (vol 2), M Zollitsch, Morning Sun Books
16: Butter and cheese express: The Auburn Branch of the New York & Oswego Midland Railroad, Richard F. Palmer, Chenango County Historical Society
17: Canal Boats, Interurbans and Trolleys (The Story of the Rochester Subway), Amberger, Rochester Chapter NRHS
18: Change at Ozone Park, Herbert George, RAE publishing (1993)
19: Clear the Tracks! The story of an old-time locomotive engineer, Joseph Bromley, Wittlesey House (1943)
20: Coal to Cananda, history of the Ontario Car Ferry Company, Ted Rafuse, Steam Power Publishing
21: Coming of the New York & Harlem, The., Louis V. Grogran,
22: Commuter Trains to Grand Central Terminal, Tom Nelligan,
23: Conquering Gotham: The construction of Penn station and its tunnels, Jill Jonnes, Viking
24: Conrail, Timothy Scott Doherty, Brian Solomon, MBI
25: Copper Wires, Clerertories, and Communters - A Glimpse of Syracuse’s Interurban Story, Lawrence Meloling, (1969)
26: Creameries of upstate New York - At the Turn of the Centrury, John W. Hudson II, Depot Square Publishing
27: D. & M. and D.L.&W: putting Dansville on the Railroad Map, William J Rauber,
28: Days along the Buckwheat and Dandelion The Unadilla Valley Railway, Fred Pugh,
29: Delaware & Hudson, Jim Saughnessey, Syracuse University Press
30: Delaware & Norhtern and the towns it served, The., Gertrude Fitch Horton, Purple Mountain Press (1989)
31: Delaware Lackawanna & Western Railroad’s Syracuse Division, The., John W & Suzanne C. Hudson, Depot Square Publishing
32: Destruction of Penn Station, The., Barbara & Peter Moore ,
33: Diesels of the Sunrise Trail, John J. Scala, Weekend Chief (1984)
34: DL&W in the 19th century, Thomas Tabor,
35: DL&W in the 20th century vol. I, Thomas Tabor,
36: DL&W in the 20th century vol. II, Thomas Tabor,
37: Doctor Durant and his iron horse, Harold K. Hochschild, Adirondack Museum
38: Ed Nowak's New York Central – A company photographers view of the Railroad, Ed Nowak, Karl Zimmermann, PTJ Publishing (1983)
39: Eight Miles along the Shore: An Illustrated History of Greece, NY, Virginia Tomkiewicz, Shirley Cox Husted, The Greece Historical Societey (1982)
40: Electric Heritage of the Long Island Rail Road, Ron Ziel, John Krause, Carstens (1986)
41: Erie Lackawanna Death of An American Railroad 1938-1992, H. Roger Grant, Stanfort University Press
42: Erie Lackawanna In Color. Volume 2 New York State, Larry DeYoung, Morning Sun Books
43: Erie Lackawanna In Color. Volume 3 The East end, Larry DeYoung, Morning Sun Books
44: Erie Lackawanna In Color. Volume 5 Merger Memories, John R. Canfield, Morning Sun Books
45: Erie Lackawanna Memories, Preston Cook, Old Line Graphics (1987)
46: Erie Memories , Edward J. Crist , Quadrant Press (1993)
47: Erie Railroad in Color, David R. Sweetland, Morning Sun Books
48: Erie Railroad Rochester Division, The., William R. Gordon,
49: Fairy Tale Railroad The Mowhawk and Malone, Henry A. Harter, North Country Books
50: Fonda, Johnstown & Gloverville Railroad, The., Randy L. Decker,
51: Forgotten Railroads Through Westchester County, Robert A. Bang,
52: From Glenagore to Guilford Irish Destiny on the O&W, Patrick R. McElligott, (2004)
53: Gangly Country Cousin Lehigh Valleys Auburn Division 9The), Herbert V Trice,
54: Genesee & Wyoming Railroad Company, The., , G&W RR (1970)
55: Glen Route, The., Sheldon S. King,
56: Glenfield & Western Railroad, The., Brian D. Mumford, Frederick J. Schneider, Frederick J. Schneider (2003)
57: Gone but not forgotten: The Marcellus & Otisco Railway, Richard F Palmer, Central New York chapter NRHS
58: Grand Central Terminal: City within the City, Deborah Nevins, Municipal Art Society of NY
59: Grand Central, the World's Greatest Railway Terminal, William D. Middleton, Golden West Books
60: Grand old Stations and Steam Locos of the Ulster & Delaware, The., John M. Ham, Robert K. Bucenec, Stony Clove & Catskill Mountain Press
61: History of Railroad operations at Kodak Park, , Eastman Kodak Co (1963)
62: History of Railroads in Tomkins County, Hardy Lee
63: History of Railroads in Western New York, A., Edward T. Dunn, Canisius College Press
64: History of the Buffalo, Rochester & Pittsburgh, Paul Pietrak,
65: History of the Hudson Valley Railway, A., David F. Nestle, Author (1967)
66: History of the Lehigh Valley Railroad Route of the Black Diamond, A., Robert F. Archer, Heimburger House Publishing
67: History of the Long Island Rail Road (volume 1), Vincent Seyfried ,
68: History of the Long Island Rail Road (volume 2), Vincent Seyfried ,
69: History of the Long Island Rail Road (volume 3), Vincent Seyfried ,
70: History of the Long Island Rail Road (volume 4), Vincent Seyfried ,
71: History of the Long Island Rail Road (volume 5), Vincent Seyfried ,
72: History of the Long Island Rail Road (volume 6), Vincent Seyfried ,
73: History of the Long Island Rail Road (volume 7), Vincent Seyfried ,
74: History of the Western New York & Pennsylvania, Paul Pietrak,
75: Hojac Railroad-Tracking Hamlin a tale of "the white elephant" line, The., Mary Smit, (1976)
76: Interurbans of New York, Felix E. Reifscheider,
77: Keuka Lake Memories, \William R. Gordon,
78: Leatherstocking Rails A History of Railroading Along the Upper Susquehanna, Jim Loudon, Leatherstocking Railway Historical Society
79: Lehigh & Hudson River in color, Jim Boyd, Tracy Antz, Morning Sun Books
80: Lehigh and New England, Ed Christ, John Krause, Carstens Publications
81: Lehigh Valley In Color, Robert J. Yanosey, Morning Sun Books
82: Lehigh Valley In Color (volume 2), Robert J. Yanosey, Morning Sun Books
83: Lehigh Valley In Color (volume 3), Jeremy F. Plant, Richard Steinbrenner, Morning Sun Books
84: Lehigh Valley Memories - A Tour of the Lehigh Valley Railroad in New York's Finger Lakes Region, 1941 – 1959, David Marcham,
85: Lehigh Valley Railroad: Wyoming & Buffalo Divisions, Mike Bednar,
86: Light Trains & Short Ties Through the Notch, John M. Ham, Robert K. Bucenec, Stony Clove & Catskill Mountain Press
87: Listen to the Whistle An Anecdotal History of the Wallkill Valley Railroad, Carleton Mabee, Purple Mountain Press (1995)
88: Little Falls and Dolgeville Railroad, The, Lucinda Parker, Worden Press (1986)
89: Logging Railroads of the Adirondacks, Bill Gove,
90: Long Island Rail Road Memories: The Making of a Steam Locomotive Engineer, Richard J. Harrison, Quadrant Press (1981)
91: Long Island Rail Road, The., Ron Ziel, George Foster, Hawthorn Books
92: Long Island Rail Road: A pictoral record of the steam-to-diesel transition east of Jamaica, Frederick Kramer, John Krause, Carstens
93: Long Island Railroads in Early Photographs, Ron Ziel, Dover publications
94: Manhattan Gateway, New York's Penn Station, William D. Middleton,
95: Manitou Beach Trolley Days: 1891-1925, , The Greece Historical Societey (reprint)
96: Metro-North's Hudson Line, Thomas V. Panettiere, Depot Square Publishing
97: Mountain Railroads of the New York State vol 3, Michael Kudish, Purple Mountain Press (2008)
98: Mountain Railroads of the New York State vol 4, Michael Kudish, Purple Mountain Press (2009)
99: Mr Cornell's Railroad & how it grew, John Connell,
100: New York Central Color Photography by Ed Nowak Book I, Ed Nowak, Morning Sun Books
101: New York Central Color Photography by Ed Nowak Book II, Ed Nowak, Morning Sun Books
102: New York Central Color Photography by Ed Nowak Book III, Ed Nowak, Morning Sun Books
103: New York Central in the Hudson Valley The Waterlevel Route in steam and Diesel, George R. Drury, Kalmbach Books
104: New York Central Railroad, Brian Solomon, MBI
105: New York Connecting Railroad, Long Island's Other Railroad, The, Robert Strum, William Thom, Sunrize Train Chapter NRHS
106: New York Harbor Railroads in Color vol 1, Thomas R. Flagg, Morning Sun Books
107: New York Harbor Railroads in Color vol 2, Thomas R. Flagg, Morning Sun Books
108: New York Ontario & Western in color, ,
109: New York Ontario & Western in the Diesel Age , Robert E. Mohowski , Andover Junction Publications (1994)
110: New York Ontario & Western Railway Milk Cans, Mixed Trains and Motor Cars, The., Robert E. Mohowski, Garrigues House Publishing (1995)
111: New York State Railways, The., Sheldon S. King, (1975)
112: New York, Westchester & Boston Railway Company: 1906-1946, The., Robert A. Bang, (2004)
113: Next Station Will Be, The . . . Volume IX, , Railroadians (1987)
114: Next Station Will Be, The . . . Volume XII, , Railroadians (1994)
115: Next Station Will Be, The. . . Volume XI, , Railroadians (1989)
116: Next stop Grand Central: A Trip Through Time On New York's Metropolitan Area Commuter Railroads, Stan Fischler, (1986)
117: Niagara By Rail I, Peter Jehrio, Coldwaters Press
118: Niagara By Rail II, Peter Jehrio, Coldwaters Press
119: Niagara By Rail III, Peter Jehrio, Coldwaters Press
120: Niagara Gorge Belt Line A Pictoral Album, , Niagara Frontier Chapter NRHS
121: Night of disaster: The New York Central Gulf Curve Wreck, David A. Taylor, Lucinda M. Parker, Artspace
122: Ninety Four Years of Rochester Railways Vol 1, William R. Gordon,
123: Ninety Four Years of Rochester Railways Vol 2, William R. Gordon,
124: O&W The long live and slow death of the New York Ontario & Western, William F. Helmer, Originally published in 1959 but recently republished
125: Old "Up and Down" Catskill mountain branch of the NYC, The., John M. Ham, Robert K. Bucenec, Stony Clove & Catskill Mountain Press
126: Old Put, The, Joe Schiavone, Brian Vangor,
127: Oneonta Roundhouse, The., Jim Loudon, Leatherstocking Railway Historical Society
128: Ontario & Western Railway Northern Division, The., John Taibi, Arcadia
129: Penn Central Railroad, Peter Lynch, MBI
130: Pennsy Era on Long Island, The, Ron Ziel, Sunrise Spectial Ltd (1984)
131: Pennsylvania Railroad's Elmira Branch, William Caloroso, Andover Junction Publications (1993)
132: Pioneer American Railroads The Mowawk & Hudson and the Saratoga & Schenectady, Daniel Larkin, Purple Mountain Press
133: Pittsburg Shawmut and Northern, Paul Pietrak,
134: Putnam Division, The., Daniel R. Gallo, Frederick A. Kramer,
135: Railroad atlas of North America Northeast, Mike Walker, Steam Powered Video (1998)
136: Railroad Days Memories of the Delaware Lackawanna & Western Railroad & Erie Lackawanna Railway Co Utica Division, Louis C. Langone, privately publised (2005)
137: Railroad Ferries of the Hudson, ,
138: Railroad for Lima: An account of New Yorks State's unique Shortline, A., Paul S Worboys, Iron Man Press (1991)
139: Railroad stations of Central New York, Robert W. Coye, Central New York chapter NRHS
140: Railroads in early postcards volume 1 upstate New York, Richard Palmer, Harvey Roehl, The Vestal Press
141: Railroads in the streets of Syracuse, , Central New York chapter NRHS
142: Railroads of New York, G.W. O’Connor, Simmons-Boardman Publishing Co (1949)
143: Railroads of the Adirondacks A History, Michael Kudish, Purple Mountain Press
144: Railroads that serve Buffalo, The., , Buffalo Chapter NRHS reprint (1982) of a 1927 original
145: Rails Along the Battenkill, Nestle,
146: Rails Along the East Brach The Delaware & Northern Railroad, ,
147: Rails Along The Hudson, Crawford & Kramer,
148: Rails along the Oriskany, John Taibi, Purple Mountain Press
149: Rails around Gotham, Paul Carlton, Paul Carlton Books (1981)
150: Rails in the North Woods A History of ten Adirondack Shortlines, ,
151: Rails North - Lehigh Valley Railroad in New York State, , Central New York Chapter NRHS
152: Rails through Cortland: the History of railroading in Cortland County, Richard F. Palmer,
153: Railway Switching Yard at Maybrook New York and its connecting lines, The., Marc Newman, Purple Mountain Press
154: Remembering the New York Ontario & Western Railway, John Taibi, Purple Mountain Press
155: Rip Van Winkle Railroads, William F. Helmer,
156: Rochester & Genesee Valley Rails, Mary Hamilton-Dann, RRP
157: Rochester Lockport and Buffalo RR, William R. Gordon,
158: Rochester, Syracuse and Eastern, The., William R Gordon,
159: Route of the Phoebe Snow a history of the Delaware Lackawanna & Western RR, The., Sheldon S. King, Railroad Avenue Enterprises
160: Rutland Road, The., Jim Saughnessy, Syracuse University Press
161: Sapbush Run: An informal History of the Black River and Utica RR, The, Thomas C. O'Donnell, Black River Books (1948)
162: Saving Union Station (Albany), Finnegan,
163: Shortlines of Central New York Marcellus & Otisco Lake Railroad Skaneateles Shortline Railroad, Richard F. Palmer, Central New York chapter NRHS
164: Snowflaker, The., Bill Kachler,
165: South Buffalo Railway, Stephan M Koenig, South Platte Press
166: Southern Tier Lines, Todd & John Humphrey, Rainy day Books
167: Steam Era of the Lehigh Valley, The., Chuck Yungkurt, Andover Junction Publications (1991)
168: Steel Rails to the Sunrise, Ron Ziel, George Foster, Hawthorn Books (1965)
169: Story of the Rochester & Sodus Bay Railway, The., William R Gordon,
170: Story of the Rome, Watertown and Ogdensburg Railroad, The., Edward Hungerford, Historical Association of South Jefferson (reprint of 1922 original)
171: Syracuse and South Bay Railway To Onedia Lake, William R. Gordon, Joseph G. Platukis, (1986)
172: Syracuse, Binghamton and New York Railroad, The., , Central New York chapter NRHS
173: That Unionville Train A look at the Middletown & Unionville/Middeltown & New Yersey, Carl A. Detwyler, Ontario & Western Railway Historical Society
174: Timetable pictorial of the West Shore, Ed Gardner, Author
175: Timetable pictorial of the West Shore volume 2, Ed Gardner, Author
176: To The Mountains by Rail, Manville B. Wakefield, Wakefair Press (1970) and republished by Purple Mountain Press (1989)
177: Toonervilles of the Empire State, Felix E. Reifscheider,
178: Trackside around Buffalo 1953 – 1976, Reg Button, Devan Lawton, Morning Sun Books
179: Trackside around Sayre-Towanda-Wavery, Jeremy F. Plant, Bill Caloroso, Morning Sun Books
180: Trackside around the Niagara Peninsula 1953 – 1976, Stephan M. Koenig, Morning Sun Books
181: Trackside East of the Hudson 1941 - 1953, Jeremy Plant, Morning Sun Books
182: Trackside in the Albany, N.Y. Gateway 1949 - 1974, Len Killian, Jim Odell, Morning Sun Books
183: Train Wrecks & Disasters A Pictorial & Chronological History as Reported by the Press , William Fries , (1994)
184: Trolley Lines of New York, Felix E. Reifscheider,
185: Trolley trips through the Hudson Valley 1911, , Purple Mountain Press
186: Trolleys to Glen Haven, Charles R Lowe, Purple Mountain Press
187: Twentieth Century Limited, D. Cook,
188: Twenty-Five Years on the ND&C, Bernard L Rudberg, Purple Mountain Press
189: Ulster and Delaware Railroad through the Catskills, The., Gerald M. Best, Golden West Books
190: Union Station, Albany, Gerber,
191: Union Station, Utica, , Landmarks Society of Utica
192: Upstate Odyssey The Lehigh Valley in Western New York, Mary Hamilton-Dann, RRP
193: Water Level Route, The., Charles M. Knoll, Rochester chapter NRHS (1976)
194: Wellsville Addison, and Galeton Railroad , Edward Lewis, Short Tracks Development Corp. (1971)
195: Westchester's Forgotten Railway: An Account of the New York, Westchester, and Boston Railway company, Roger Arcara, I&T Publishing
196: Western New York and Pennsylvania Railway its predecessors and sucessors, Paul Pietrak,
197: Western New York and Pennsylvania Traction , Benson Rohrbeck,
198: When Rochester Rode By Rail, , the Rochester Chapter NRHS
199: When the Railroads Went to the Beach, John Taibi, A. Bruce Tracy, Depot Square Publishing (1999)
200: When the Westchester was new, Roger Arcara,
201: Where did the tracks go in the Central Adirondacks? (Mountain RR in the NY State volume 2), Michael Kudish, Purple Mountain Press
202: Where did the tracks go in the Western Adirondacks? (Mountain RR in the NY State volume 1), Michael Kudish, Purple Mountain Press
203: Where Did The Tracks Go?, Michael Kudish, Purple Mountain Press (1985)
204: Williamsport and Elmira RR, The., Thomas Tabor, (1986)
Right now I have 108 out of 204.
Gijs