Updated April 14th, 2025, they are no longer open to direct submissions.
Walker Books, an established and respected UK based publisher of Picture books, is open to direct submissions, but only of work that is already illustrated. So if you have an un-illustrated picture book, this is not the right home for it.
Walker Books is part of The Walker Books Group is one of the world’s leading independent publishers of children’s books. Their international imprints include This vibrant international Candlewick Press in the United States, and Walker Books Australia, which has locations in Australia and New Zealand. They’ve published many of the most established writers and illustrators, and my bookshelf contains a lot of the books they’ve published. You can get a good feel for their catalog here.
They accept submissions by email and they only respond to submissions if they are interested.
Please follow their submission guidelines carefully and only submit if you feel like your work is a good potential fit.
You can access their submission guidelines here.