The  case of the backyard treasure
By: by Joanne Rocklin ; math activities by Marilyn Burns ; illustrated by John Speirs.
Contributors: Burns, Marilyn, 1941-; Speirs, John, ill.
Series: Hello reader! Math.
Publisher: Scholastic
Published: 1998
Place of publication: New York
Language: eng
Subjects: Mystery and detective stories; Ciphers -- Fiction; Maps -- Fiction
Description: Liz the Whiz and her younger brother use codes, a chart, and a map of the backyard that matches a clock face to solve Zack's mystery. Includes a section with related activities.