Do you mean reprinted, updated, or both? As for reprinted (meaning printing the 2nd edition from 1973), I doubt it will. It is outdated already, and copies are on EBay almost monthly. The 1st edition is on EBay about three times a year. Both can usually be had for under $25.
As for an updated version, he has said that he has no desire to write a third edition. He has moved on to other railroads and other things. If I remember correctly, he was set to retire soon from the Aberdeen & Rockfish Railroad down south.
As for plans for a book about the A&A authored by someone else, I cannot comment personally on it. I know several people who have expressed an interest in it, and one person who is more than interested. However, it is not my place to speak for them.
A new book would be nice, though.
Benjamin L. Maggi
A&A Railroad Forum Moderator