General technical analysis:

• Technical Analysis of the Futures Markets: A Comprehensive Guide to Trading Methods and Applications by John J. Murphy
• Japanese Candlestick Charting - Second Edition by Steve Nison
• Bollinger on Bollinger Bands by John A. Bollinger
• Fibonacci Ratios With Pattern Recognition by Larry Pesavento
• Elliott Wave Principle: Key to Market Behavior by Frost and Prechter

FOREX books:

• Trading in the Global Currency Markets by Cornelius Luca
• Technical Analysis Applications in the Global Currency Markets by Cornelius Luca
• The Disciplined Trader: Developing Winning Attitudes by Mark Douglas
• Trading in the Zone: Master the Market with Confidence, Discipline and a Winning Attitude by Mark Douglas