Here are some very interesting books: 1) Football Conditioning: a Modern Scientific Approach 2 Book Set – Speed & Agility | Injury Prevention | Periodization Training | Small Sided Games; 2) Strength and Conditioning for Sports Performance; 3) How to Support a Champion: The art of applying science to the elite athlete; 4) What We Need Is Speed: Scientific Practice of Getting Fast; 5) Soccer Analytics: Successful Coaching Through Match Analyses