Lost and found
"When Lu's sister disappears, the dog detectives must spring into action! In this activity storybook, readers help solve the mystery and learn about sound science at the same time" Cf. Our choice, 2003
Readers
32 pages : illustrations ; 23 cm.
9781554532513, 9781554532520, 9780329662981, 1554532515, 1554532523, 0329662988
155849456
Previously published under title: Sound off
"Kids can read with help. Level 2"--Cover