Great question, and one I frequently get asked. Here they are:

1. Predictable Revenue by Aaron Ross - this book will show you step-by-step how to build a modern revenue machine. A great book for those who love process.

2. The Challenger Sale by Matthew Dixon and Brent Adamson - explains differences between top-performing salespeople and how to win deals in a customer-empowered world.

3. Think and Grow Rich by Napoleon Hill - more a success book than a sales book, but I've found key learnings in this book that have helped me grow as a sales leader. Hill interviewed the most successful people in the early 1900s and compiled interesting tidbits about what made them successful.