I recently listened to the audio version of what I believe is a foundation investing book. What I mean by that is you should read (or listen to) this book before you read more specific investing books about stocks, options, real estate and so on.
The Richest Man In Babylon
This book is where you should start if you want to take the money that your earning from your normal jobs and really make it work for you. The Richest Man in Babylon by George S. Clason is written in such a way that you won’t be able to put it down. It’s story format makes investing interesting and intriguing to the normal person.