Perplexed cat. Hotel Infinity. What wasn't to like?
Let Z stay up late and skip a shower to finish this one. ( )

This is a cute book with well-drawn illustrations. Its mission is to impart a mathematical understanding of infinity to young people and it is down in a rather clever fashion. The big task is how to fit Zero in a room when Hotel Infinity's rooms are all "filled up." ( )

With thin pencil lines, in black and white cartoon fashion, O’Brien creates an imaginary world where numbers live in the Hotel Infinity, run by Mr. & Mrs. Hilbert and their white cat (who mostly sleeps peacefully curled up by the fireplace), where there is a room number 1 but no last room. The numbers know four games: addition, subtraction, multiplication and division. The only game they don’t like is division because not all of them can play. The story covers the inclusion of letters standing in for numbers (like math problems), fractions, and its all done in fun cartoonesque fashion, that even if the cat can’t figure it out and has to move to Corsica (where the Hotel has only 20 rooms, so no numbers or letters can visit) the 9-12 reader will.
If You Liked This, Try: Cookies: Bite-Size Life Lessons by Amy Krouse Rosenthal, Sea Horse: The Shyest Fish in the Sea by Chris Butterworth, Zelda and Ivy: The Runaways by Laura McGee Kvasnosky, Robert and the Practical Jokes by Barbara Seuling, Invisible by Katia Kamm. ( )