Readers of all ages will enjoy the challenge of discovering the answers to—or being stumped by—these interactive mysteries. In brief paragraphs and black-and-white illustrations, award-winning author Sandy Silverthorne and John Warner present 70 puzzles, each with a logical "aha" answer that requires thinking outside the box. Clues and answers are included in separate sections.

Mystery:
A man is looking at a clock that displays the correct time, but he doesn't know what time it is. Why not?

Clues:

• The man can see and tell time perfectly well.
• The clock is normal and in plain sight.
• More than one clock is in the room.

Solution:
Each clock in the room is displaying a different time, so he doesn't know which one is correct.