Tor Books is the publisher of all the novels in the Enderverse, as well as most of Orson Scott Card's other works. It is one of two imprints of Tom Doherty Associates LLC, based in New York City. It is noted for its science fiction and fantasy titles. Tom Doherty Associates also publishes mainstream fiction, mystery, and occasional military history titles under its Forge imprint. The company was founded by Tom Doherty in 1980, and sold to St. Martin's Press in 1986. Along with St. Martin's Press, Henry Holt, and Farrar, Straus and Giroux, it is now part of the Holtzbrinck group, now known as Macmillan Publishers.
In March 2006, Holtzbrinck forced Tor to stop making its books available as eBooks via Webscriptions (since renamed to Baen Ebooks) because of concerns regarding the lack of Digital rights management (DRM). These concerns were said to have abated in 2007 and selected Tor titles may eventually be available as e-books via Baen Ebooks and a variety of other online retailers. However, as of January 2010, it still had not happened.
Tor has won the Locus Magazine poll for best science fiction publisher every year since 1988.
Tor also publishes more award-winning and -nominated science fiction books (269 as of April 2012) than any other publisher.