What personal development books do you read or listen to?

This question was sparked by another post :) What books do you read or listen to that make you become a better version of yourself? Why do you like or don't like it? One of the recent books I listened to was The Entrepreneur Roller Coaster by Darren Hardy. Although it's probably meant for entrepreneurs (at least the beginning of the book), it gives some great tips about hiring, leading and managing people. What's on your shelf, on your Kindle or Audible app?