Isn’t eight gold medals enough? Not for Michael Phelps, who’s just added another job to his resume: children’s author. The Olympic medalist has released How to Train with a T. Rex and Win 8 Gold Medals, in which he describes his disciplined swimming regimen in an understandable way. He explains how he swam 20,000 kilometers to train for the Olympics, and recalls the harrowing 100-metre butterfly victory that he won by one-hundreth of a second. Let’s hope the Serbian swim team doesn't get their hands on How to Train with a T. Rex!