Start with high-confidence colors books, then narrow by subgenre or adjacent topics.
Bluey: Big Backyard: a Coloring Book
Penguin Young Readers Licenses, Penguin Books
Bluey: Fun and Games: a Coloring Book
Penguin Young Readers Licenses
Fisher-price: Giant Coloring Book
Mattel
Little Coloring Animals
Kirsteen Robson, Jenny Addison
Big Book of Colors
Felicity Brooks, Sophia Touliatou
