"The Lean Gains" Book Collection is a total of 6 books available in various formats, and collectively written over a period of 7 years. All of the information is fact-based, and science-backed. We do not expect you to invest in a copy until you get an idea of what it's all about, so please feel free to read the first 30 or so pages of each book. If you like what you see, then head on over to our online shop and treat yourself (or friend) to a copy .'