This book is a great little introduction to REAL economics- not the useless junk most often taught in schools- but the real economics that makes the world go-round. This book briefly tries to explain why it is important that everyone in a company understand this, but falls a little short. For more detail on this aspect, I strongly recommend the classic "Open-Book Management" By John Case.

This book will also help you understand financial statements, particularly income statements. This comes in handy when looking at your company's public competitors or for analyzing investments.