The winners of the 2021 Mathical Book Prize have been announced by the Mathematical Science Research Institute. The prize recognizes outstanding mathematical fiction and nonfiction for ages 2-18 and is selected by teachers, librarians, mathematicians and others. Here are the winners:

PRE-KINDERGARTEN WINNER

Lia & Luis: Who Has More? by Ana Crespo

GRADES K-2 WINNER

The Animals Would Not Sleep by Sara Levine

GRADES 3-5 WINNER

Seven Golden Rings: A Tale of Music and Math by Rajani LaRocca

GRADES 6-8 WINNER

How We Got to the Moon by John Rocco

GRADES 9-12 WINNER

Grasping Mysteries: Girls Who Love Math by Jeannine Atkins