I am a member of Children's Book Insider. Each month they send a very informative e-magazine, which includes publishers who are accepting submissions. Below is a link which may be useful. Whitley Abell of Inklings Literary Agency (http://www.inklingsliterary.com) is currently open to middle grade and young adult submissions, be it contemporary or historical, romance or thriller, realistic or speculative, tragic or quirky. She is looking for books with a great hook or a fascinating world, a strong but real protagonist, a story she can sink her teeth into, and, most importantly, a voice she wouldfollow to the end of the world and back. Strong female voices are especially appreciated, and she is particularly drawn to little-known retellings and characters who are genuinely ﬂawed but (usually) well-meaning. Send your query and ﬁrst ten pages in the email body to email@example.com with “Query Whitley: BOOK TITLE” in the subject line. No picture books or nonﬁction.