The Lost Key - A Mystery with Whole Numbers
Melinda Thielbar
The Hundred-Dollar Robber - A Mystery with Money
Melinda Thielbar
The Secret Ghost - A Mystery with Distance and Measurement
Melinda Thielbar
The Kung Fu Puzzle - A Mystery with Time and Temperature
Melinda Thielbar
The Ancient Formula - A Mystery with Fractions
Melinda Thielbar
The Fishy Fountain - A Mystery with Multiplication and Division
Melinda Thielbar
The Book Bandit - A Mystery with Geometry
Melinda Thielbar
