Great book that has guidance about all personal improvement strategies. Even goes into a strategy to buy good clothes, necessary to look and act the part you want to be, simply spend more on less things. Lots of good content, highly readable and highly recommend.
Survive Like a Spy: Real CIA Operatives Reveal How They Stay Safe in a Dangerous World and How You Can Too by Jason Hanson
Starts off about how to recruit spies – if trying to recruiting someone who indicates he feels insecure about his career, they will likely tell