Clarkesworld is a monthly online science fiction and fantasy magazine first published out of the USA in October 2006. Each issue contains at least two pieces of original fiction from new and established authors. These are also collected by issue in signed chapbooks, ebook editions/subscriptions and in the magazine's annual print anthology, Realms.
Among the authors published to date have been Sarah Monette, Catherynne Valente, Elizabeth Bear, Caitlin R. Kiernan, Kij Johnson, Peter Watts, Stephen Dedman and Jeff VanderMeer.
Clarkesworld Magazine is published by Clarkesworld Books, a long-running independent US online bookstore speiclaising in speculative fiction.