Hawkeye Collins and Amy Adams, two twelve-year-old sleuths, solve nine mysteries using Hawkeye's sketches of important clues. The reader is asked to use Hawkeye's sketches and hints to solve the mysteries.

"This title was previously cataloged with the following information: Masters, M."--Title page verso.

The case of the computer camp kidnap -- The secret of the tomato pincher -- The mystery of the unknown rescuer -- The case of the video game smugglers -- The mystery at Mill Creek bridge -- The secret of the author's autograph -- The mystery of the rainy night robbery -- The mystery of Amy's disappearance -- The case of the sloppy vandals -- The secret of the ancient treasure ; Part 3: The mysterious message -- Solutions.