Product Strategy

• Crossing the Chasm and Inside the Tornado, both by Geoffrey Moore.
• Marketing Management, by Philip Kotler.
• Marketing High Technology, by William H. Davidow.
• Rules for Revolutionaries, by Guy Kawasaki.
• Microsoft Secrets, by Richard Selby and Michael Cusumano.

Processes and Project Management

• The Mythical Man Month: Essays in Software Engineering, by Frederick Brooks.
• Dynamics of Software Development, by Jim McCarthy.
• Software Requirements, by Karl Wiegers.
• The Product Manager's Handbook, Linda Gorchels.
  

Usability and User Interface Design

• Designing Web Usability, by Jakob Nielsen.
• Don't Make Me Think! A Common Sense Approach to Usability, by Steve Krug.
• About Face: The Essentials of User Interface Design, by Alan Cooper.

Internationalization and Localization

• Unicode: A Primer, by Tony Graham.
• A Practical Guide to Localization, by Bert Esselink.
• Programming for the World: A Guide to Internationalization, by Sandra Martin O'Donnell.
• The Lexus and the Olive Tree: Understanding Globalization, by Thomas L. Friedman.