Tor Books

Tor Books is the primary imprint of Tor Publishing Group (previously Tom Doherty Associates), a publishing company based in New York City. It primarily publishes science fiction and fantasy titles.

From the Wikipedia article “Tor Books”, licensed under CC BY-SA 4.0.

An imprint is a brand inside a larger publishing house, often with its own editors and list. Imprints of large groups usually acquire through literary agents; read recent titles to see whether your book fits the list, then target agents who sell to it.