Conversation so far:
Who did the artwork for Dr. Seuss books?
Theodor Seuss Geisel is known for his work writing and illustrating more than 60 books under the pen name Doctor Seuss.
What did Theodor Seuss Geisel draw?
Geisel evidently enjoyed drawing architecturally elaborate objects.
What books did Theodor Seuss Geisel illustrate?
The Cat in the Hat is a children's book written and illustrated by Theodor Geisel
Did Theodor Seuss Geisel draw anything besides machines?
Geisel's style was unique – his figures are often rounded and somewhat droopy. This is true, for instance, of the faces of The grinch and the Cat in the Hat.
Theodor Seuss Geisel drew lines that accompanied what?
Geisel also follows the cartoon tradition of showing motion with lines, like in the sweeping lines that accompany Sneelock's final dive in If I Ran the Circus.
Who's Sneelock in relation to Doctor Seuss?
Mr. Sneelock is a man who owns a ramshackle store in front of a empty lot where little Morris McGurk plans to build a cirus.

Question: are any other books mentioned?
Self-contained rewrite: Are any other Doctor Seuss books besides If I Ran the Circus mentioned?