Harper Voyager, HarperCollins’ science fiction and fantasy imprint, will accept complete and unagented manuscripts for two weeks.
From October 1 until October 14, authors from around the world can send their manuscripts through this submission portal. You can find all the submission details at this link. Here’s more from the publisher:
The manuscripts will then be read and those most suited to the global Harper Voyager list will be selected jointly by editors in the USA, UK and Australia. Accepted submissions will benefit from the full publishing process: accepted manuscripts will be edited; and the finished titles will receive online marketing and sales support in World English markets. Voyager will be seeking an array of adult and young adult speculative fiction for digital publication, but particularly novels written in the epic fantasy, science fiction, urban fantasy, horror, dystopia and supernatural genres.

 The global effort is led by U.K. deputy publisher director Emma Coode, Australian associate publisher Deonie Fiford, and U.S. executive editor Diana Gill.