Book Cover

Grumpy Monkey Up All Night

Contributor(s): Lang, Suzanne (Author), Lang, Max (Illustrator)

ISBN: 9780593306215

Publisher: Random House Studio

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Pub Date: July 14, 2026

Lexile Code: 0530

Target Age Group: 00 to 03

Physical Info: 0.00" H x 0.00" L x 0.00" W ( 0.31 lbs) 32 pages

Series: Grumpy Monkey Board Books

Accelerated Reader® Info

Quiz #:0000510412 ( Grumpy Monkey Up All Night)

Reading level: 2.50

Interest level: LG

Point value: 0.5

Descriptions, Reviews, etc.

Description: Everyone's favorite New York Times bestselling Grumpy Monkey is back in board book edition of this hilarious bedtime story about dealing with a sibling and frustration when you don't get to do what you want!

Jim Panzee is going to a slumber party and there's LOTS to do. Jim plans on bobbing for mangoes, going termite fishing, and of course staying up all night!
But Jim gets more than a little frustrated when his little brother, Tim, ruins his good time. All the things Jim wanted to do aren't fun anymore. Then, one by one, everyone else falls asleep (even Norman!), while Jim is determined to stay up. How long will he last? And will Tim ruin this, too?
In this board book, Jim deals with sibling rivalry and the aftermath of staying awake way past his bedtime.

For more grumpiness, check out these Grumpy Monkey board books:
Grumpy Monkey Says No!
Grumpy Monkey Are We There Yet?
Grumpy Monkey Yuck!
Grumpy Monkey Mine!

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