An imaginative mouse who likes to read heroic fantasy novels finds herself on the school math team as it prepares to compete for the coveted Golden Slide Rule.

Members of the Critter Club are all excited about their summer plans until Liz learns that, instead of taking an art class, she will have to be in summer school to improve her math skills, but a fun teacher, a classroom pet, support from her friends, and advice from her brother might get her through.

In ancient India, a boy named Bhagat travels to the rajah's city, hoping to ensure his family's prosperity by winning a place at court as a singer. Includes author's note about binary numbers.