Here is a list of some of the books/audio books I’ve read/listened to over the years that I really enjoyed and recommend:

Economics

  • Freakonomics
  • The World is Flat 3.0

Mathematics

  • Fermat’s Enigma

Personal Finance

  • The Bogleheads’ Guide to Investing
  • The Coffeehouse Investor
  • The Millionaire Next Door
  • The Only Investment Guide You’ll Ever Need

Security

  • The Art of Deception
  • The Art of  Intrusion
  • The Code Book
  • The Cuckoo’s Egg
  • Secrets and Lies
  • Spies Among Us

Systems and Network Administration

  • The Practice of System and Network Administration
  • Time Management for System Administrators