Grimm's World

Grimm's World is a 1969 science fiction novel by Vernor Vinge.

Background
In 1968, Damon Knight published Vinge's novella "Grimm's Story" as part of Orbit 4. Knight told Vinge that if he expanded the novella to book-length, then he would get Vinge a contract with Berkley Books, where Knight worked as a science fiction editor. Vinge wrote an extension, and it became his first published novel. In 1987, Vinge revised the novel for Baen Books and added a new opening section, changing the title to Tatja Grimm's World.