is a children's book written and illustrated by Theodor Geisel under the pen name Dr. Seuss and first published by Random House on November 12, 1978.

[1][2] In the book, the Cat in the Hat shows his son Young Cat the fun he can get out of reading, and also shows that reading is a useful way of gaining knowledge, and the thrill of the ways to read.

This book was written after Seuss' vision began to fade, and he started wearing glasses.

The book is dedicated to "David Worthen, E.G. (Eye Guy)", who was his ophthalmologist.

When one reads with their eyes open, they will be able to learn a large amount of wonderful things, some of which are shown through illustrations.