Math

• Knuth, The Art of Computer Programming, vols 1-4. (links: amazon)
• Feynman, Feynman Lectures on Physics, vols 1-3. (links: amazon)
• MacKay, Information Theory, Inference, and Learning Algorithms (2003), Cambridge Press. (links: author & pdf)
• Weisstein, CRC Concise Encyclopedia of Mathematics (2002), 2nd Ed, Chapman & Hall/CRC. (links: amazon)
• Motwani & Raghavan, Randomized Algorithms (1995), Cambridge Press. (link: cambridge)
• Cowell, et.al., Probabilistic Networks and Expert Systems (2003), Springer. (links: amazon)
• Douglas R. Hofstadter, Gödel, Escher, Bach: An Eternal Golden Braid (1999), Basic Books. (links: amazon)

Tex/LaTeX

• Grätzer , Math Into Latex (2000), Birkhauser Boston. (links: amazon)

Programming

• Conway, Perl Best Practices (2005), O'Reilly. (links: o'reilly)
• Szor, The Art of Computer Virus Research and Defense (2005), Pearson Education. (links: b&n)
• Knuth, Literate Programming (1992), Center for the Study of Language and Inf. (link: amazon)
• Knuth & Levy, The CWEB System of Structured Documentation, Version 3.6 (1995), Addison-Wesley Professional (link: amazon)
• Mullet & Sano, Designing Visual Interfaces: Communication Oriented Techniques (1994), Prentice Hall PTR. (link: amazon)
• Norvig, Paradigms of Artificial Intelligence Programming : Case Studies in Common Lisp (1991), Morgan Kaufmann. (link: amazon)

Social Science

• McDonough & Braungart, Cradle to Cradle (2002), North Point Press. (links: bn, /.)

Productivity

• Buzan & Buzan, The Mind Map Book: How to Use Radiant Thinking to Maximize Your Brain's Untapped Potential (1991), Penguin USA. (links: walmart, amazon)
• Allen, Getting Things Done: The Art of Stress-Free Productivity (2003), Penguin Books. (link: amazon)

Learning

• Hastie, Tibshirani, Friedman, The Elements of Statistical Learning (2001), Springer. (links: amazon, book)
• Kearns & Vazirani, An Introduction to Computational Learning Theory (1994), MIT Press. (links: amazon)

Others

• Watterson, The Complete Calvin and Hobbes (2005 Sep), Andrews McMeel Publishing, LLC. (link: andrewsmcmeel)