Which chess book would benefit a guy with 1500 ELO the most?

Thanks!

I recently purchased "Modern Chess Strategy" by Ludek Pachman, but the descriptive notation makes the content a bit confusing. A book that uses the algebraic notation would be better. 

wow, that's an old book, maybe try Seirawan's Winning Chess Strategies: http://www.amazon.com/Winning-Chess-Strategies-revised-Everyman/dp/1857443853/ref=sr_1_1?s=books&ie=UTF8&qid=1338791117&sr=1-1

chess strategy for club players by gooten

Seirawans books are good too but I like gooten better 

The Yusupov "Build Your Chess" and "Boost Your Chess" series.

I PREFER A BOOK BY PATRICK WOLFF ONE TIME US MASTER CHAMPION===ABOUT 29.00 BARS AND NOBIL

How to Reassess Your Chess - It made my rating go from 1770 to 1856 in one week, and it's definitely worth every penny. Buy the new edition, as it has excellent examples.

How to Reassess Your Chess, Chess Strategy for Club Players, Simple Chess, Secrets of Endgame Chess Strategy and How To Play Chess Endgame by Muller, are all appropritae for your level, they are all good books.

Weapons Of Chess by Bruce Pandolfini.

A book with tough(enough) puzzles!

+1

chess strategy for club players by gooten

I'm working through Stean's book now. Very good and clear writing. 

Chess Training For Budding Champions by Jesper Hall.

Reti's Masters of the Chessboard