Toon Books

Toon Books is a publisher of hardcover comic book early readers founded by Françoise Mouly. With titles by such creators as Geoffrey Hayes, Jay Lynch, Dean Haspiel, Eleanor Davis, and Mouly's collaborator and husband, Art Spiegelman, Toon Books promotes its line as "the first high-quality comics designed for children ages four and up".

From the Wikipedia article “Toon Books”, licensed under CC BY-SA 4.0.

An imprint is a brand inside a larger publishing house, often with its own editors and list. Imprints of large groups usually acquire through literary agents; read recent titles to see whether your book fits the list, then target agents who sell to it.