"From the best-selling author behind My Weird School: a quirky new biography series that casts fresh light on high-interest historic figures. Did you know that Muhammad Ali was so terrified of flying on planes he would bring a parachute? Or that he won the Presidential Medal of Freedom? Bet you didn't know that he had an official sweat-taster to determine how salty his sweat was after each match! Siblings Paige and Turner do-and they've collected...