Fitzhenry & Whiteside

According to their website: "Fitzhenry & Whiteside Children’s Publishing Division is currently seeking manuscripts for the following: Primary picture book text (approx. 500 to 800 words) for children ages 3 to 5, Middle Grade fiction text (approx. 25,000 to 35,000 words) for children ages 8 to 12, Young Adult fiction text (approx. 40,000 to 50,000 words) for children 12 and up, Non-fiction texts for juvenile picture books 5 and up - school curriculum related, Non-fiction texts for older readers 8 and up - school curriculum related, and Non-Fiction manuscripts for Young Adult Readers 12 and up."

http://www.fitzhenry.ca/submissions.aspx