Download or read book Mutant Origins: Leonardo (Teenage Mutant Ninja Turtles) written by Nickelodeon Publishing and published by Nickelodeon. This book was released on 2012-08-09 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nickelodeon's Teenage Mutant Ninja Turtles tell their own origin stories in this 66-page novelization. Kids will thrill to the first adventure, as Leonardo reveals how he became the leader of the Turtles.