Here are some books that are a mix of psychology and economics that I think are especially suited for HN:

Behavioral Economics:

  Predictably Irrational - Dan Ariely
  Nudge - Richard Thaler
  Switch: How to Change Things When Change is Hard - Chip and Dan Heath

Economics:

  The Black Swan: Impact of the Highly Improbable - Nassim Taleb
  Fooled by Randomness - Nassim Taleb
  Drunkard's Walk - Leonard Mlodinow

Psychology:

  Opening Skinner's Box - Lauren Slater

Management:

  The Education of a Coach - David Halberstam