The Cat in the Hat Beginner Book Dictionary Dr. Seuss Hardcover The Cat in the Hat Beginner Book Dictionary by Dr. Seuss is a vintage hardcover picture book published originally in the 1960s. This illustrated dictionary, featuring the iconic character of the cat, is part of the Children & Young Adults genre and topic of cats. With its whimsical and educational content, this book appeals to young readers and collectors of Dr. Seuss's work.