The Lean Startup offers both established and aspiring entrepreneurs a real-world approach to building a business, by using validation, finding a profitable model, and creating a growth engine.

If you've heard of Eric Ries, it's probably from business or statistics classes.

Ries uses a self-described 'semi-scientific' approach to creating and managing startups, as well as driving business and achieving long-term success.

His book, The Lean Startup, is an essential how-to guide for any budding entrepreneurs looking to build successful companies.