This document consists of excerpts from the novel "InterWorld" by Neil Gaiman and Michael Reaves, including the main body of the story, an authors' note, and publication information. The narrative follows Joey Harker, a teenager who discovers he is a "Walker" capable of traveling between parallel Earths within the Altiverse. He is recruited by InterWorld, an organization dedicated to maintaining balance against the Binary (technology-based) and HEX (magic-based) empires, which seek to conquer these worlds. The story details Joey's initial, disorienting experiences with world-walking, his training, the loss of a mentor who is an older version of himself, and his subsequent mission with a team of other Joes (versions of himself from different Earths) to rescue captured Walkers and battle the forces of HEX. The authors' note clarifies the fictional nature of the work but playfully suggests its truth within an infinite multiverse, while the final sections provide copyright details and information about the authors.