There is a fair amount of books about or around the Product Management area. While a search on Amazon or B&N will discover most of them, I hope this list helps find the most popular and interesting ones, according to what I have had the chance to read. 

• Expert Product Management: Advanced Techniques, Tips and Strategies for Product Management & Product Marketing
• This is a pragmatic book. No time for theories, methodologies? Wanna go straight to be point? Then you will enjoy this book. I read it in one short plane trip and while having a drink in a restaurant.  
• Product Strategy for High Technology Companies
• This is the first book about Product Management I have read. A classic, it is highly abstract, but sows the seeds of the strategic side of a product manager. A must-read.
• Winning at New Products: Accelerating the Process from Idea to Launch
• Another must-read. Very well written, in an intermediate level between pure strategy and day-to-day tasks. It introduces the Stage-Gate methodology. 
• Winners Take All - The 9 Fundamental Rules of High Tech Strategy
• Tony Seba taught me a Product Marketing course at Stanford, and reading his book helped me see some valuable issues regarding product management. Very pragmatic, with lots of Silicon Valley examples.
• Subject To Change: Creating Great Products & Services for an Uncertain World: Adaptive Path on Design
• Short book, and to the point: customers rule the world of products, but you must listen very hard. Beware: AdaptivePath, the author's company, is everywhere in the book.