IDW's Teenage Mutant Ninja Turtles comics synthesize and remix 40 years of Turtles' lore and transform it into a single, sprawling epic! This sourcebook collects and catalogs every character, every location, and every notable event-and serves as a comprehensive companion to that epic-into four issues by writer Patrick Ehlers. What lies in the space between spaces? What exists beyond the edge of time? The Teenage Mutant Ninja Turtles take their fight to the Thin Places and discover worlds and creatures that defy explanation. Issue #3 of the TMNT Sourcebook catalogs the deeds of an ancient Pantheon fighting for control of the world, of the interdimensional mega-corporation the Null Group, and of the time travelers who threaten to unmake reality with every swing of their Time Scepters. Traverse the Astral Plane, explore alternate realities, master kuji-kiri, and understand the energy that connects every soul in existence.