Jo Fletcher Books is an imprint of Quercus Publishing, the only imprint that accepts unsolicited submissions. Jo Fletcher Books publishes science fiction, fantasy, and horror books for adults. They are not interested in children’s or young adult books, or in short story collections or novellas.

They are established, have distribution, and have published a number of critically acclaimed authors. You can see their catalog here to get a better idea of what they have previously published. They seem to be interested in books that combine various components from different genres, such as science fiction with mystery elements. The covers are generally well designed.

Their website is well organized, although there are some redundancies. The focus is on selling books, not on recruiting new authors.

All submissions must be made via email. Send either the first 10,000 words of your novel or the first three chapters. They have formatting guidelines you must follow in order for your work to be considered.

Include a cover letter and a one-page synopsis as a separate document. If you have not heard from them six months after submitting, assume rejection. They do not respond to submissions unless they are interested.

To learn more, read their full submission guidelines here.