What makes great heroes? Great villains of course! And the TMNT have some of the greatest in pop culture! This third collection digs into the dark underbelly of the Turtles' world, focusing on Leatherhead, Baxter Stockman, Rat King, and of course, the sinister Shredder! Gathering stories from throughout their history, see the characters develop from their early roots in the original comics to their monstrous present day incarnations. Delve into issues from the Mirage series, TMNT Adventures, and Tales of the TMNT to IDW's current ongoing universe. Uncover crucial tales of tragic occasional TMNT ally Leatherhead, conniving scientist Baxter Stockman, the otherworldly Rat King, and the Turtles' archnemesis, Shredder. Includes issues by TMNT co-creators Kevin Eastman and Peter Laird, plus contributions from Dan Duncan, Paul Allor, Mateus Santolouco, Jim Lawson, Ryan Brown, Dean Clarrain, Tom Waltz, and Bobby Curnow.