Depends on where you're at in terms of progress.
My current top 10 would be:
- Silman's new endgame book.
- Silman's Reassess your chess.
- Pawn Power - Kmoch
- Chess for Tigers - Simon Webb
- Amateur's Mind - Silman
- Simple Chess - Michael Stean
- Complete Chess Strategy (Vols 1,2,3, not the condensed one!) - Pachman
- Mammoth book of World's Greatest Games
- Build up your chess Series - Arthur Yusupov
- Elements of Positional Evaluation - Heisman
What are your top 10 chess books that are worth buying?
Thanks