If you listen to heavy hitters in strength & conditioning long enough—folks like Poliquin, Cosgrove, Simmons and even the late Mel Siff—you will hear reference to Vladimir M. Zatsiorsky and the book
Science and Practice of Strength Training. Why? Because this book provides the theoretical underpinnings for how one may approach one's genetic potential in strength and power development. Remember—strength before strength endurance!