Start with high-confidence q&a & facts books, then narrow by subgenre or adjacent topics.
Lots of Knock-knock Jokes for Kids
Whee Winn
Would You Rather? Summer Edition
Lindsey Daly
What Did We Use Before Toilet Paper?
Andrew Thompson
True Facts That Sound Like Bull$#*t
Shane Carley
Silliest Hidden Pictures Puzzles Ever
Highlights
The Big Book of Silly Jokes for Kids
Carole P. Roman
The Hardest Hidden Pictures Book Ever
Highlights, Highlights for Children
Ultimate Puzzle Challenge!