I fully recommend 'Learn to Program 2D games in Blitz Basic' by "Krylar" as a lot of stuff in there is applicable to 3D games (types/data banks/arrays/waypoints/particles/multiplayer, etc).
There is a Blitz3D book apparantly in the making - there is info on this over at Coders Workshop - where you can also buy the above book.
There is a Blitz3D book apparantly in the making - there is info on this over at Coders Workshop - where you can also buy the above book.