Well, so far, the best bet I can think of for getting instruction books is Atari2600.com, followed closely by the forums here. I'm going to have to try OKRGS soon, too.
Anyway, what I'm looking for are lots of anywhere from 10 to 100 instruction books to try and fill holes in that part of my collection. I have one Imagic book left to get (Fathom), three Data Age books (Bermuda Triangle, Airlock, and SSSnake!), two Starpath (Sword of Saros and Survival Island), and three CBS (Omega Race, Solar Fox, and Blueprint) to get. There are others besides those I'm missing for almost every company. My M network collection is complete (both carts and manuals) thanks to the generous folks here.
Anyway, what I'm looking for are lots of anywhere from 10 to 100 instruction books to try and fill holes in that part of my collection. I have one Imagic book left to get (Fathom), three Data Age books (Bermuda Triangle, Airlock, and SSSnake!), two Starpath (Sword of Saros and Survival Island), and three CBS (Omega Race, Solar Fox, and Blueprint) to get. There are others besides those I'm missing for almost every company. My M network collection is complete (both carts and manuals) thanks to the generous folks here.