The books helped bestow the knowledge of a 10 year fitness enthusiast into me in a few days. It gave me the knowledge to proof read a program to see if it would be beneficial and how to adjust it to make it fit my goals and lifestyle. The nutrition side of the books let me be able to confidently and correctly set up my macros to hit my goals with borderline 100% accuracy. If you want to basically transplant the brains of Eric Helms, Andy, Andrea, and Matt Ogus into your head get these books.