Behind The Scenes With Manny Pacquiao - The Greatest Pound-For-Pound Fighter In The World. By Gary Andrew Poole. Offers a complete biography of the only boxer to ever win seven championships, from his childhood in a cardboard shack in The Philippines to his partnership with trainer Freddie Roach to his rise to become the best pound-for-pound fighter in the world. Paperback book. Published 2011.