There are endless endgame books, but I will make a suggestion. Obtain a computer chessgame (there are many free ones) that supports Endgame Tablebases (EGTB). Set up an endgame position and the game should instantly label it as win, draw or loss. Some experimentation will be required.
I think that Shredder home in inet offers this service for free also.
grandad
Do you know where can I see a list (if there is one) of "theoretical draw positions" in the endgame?
Thanks for your help