Book by Avinash K. Dixit
If you've looked for a foray into Game Theory, this is it. It walks through a bunch of important ideas in Game Theory, from auctions to equilibrium in games. This book is filled with models that you can apply in many contexts, introduced through approachable examples—although, some chapters are easier to get through than others. Working my way through my highlights in the book is already proving rewarding, but it's definitely dense in information (but not in language). Don't read this as a before-sleep-pass-out-book. This is a wide-awake-and-ready-to-stop-and-think book. A good one at that.