Book excerpt: 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. Hours of wholesome entertainment is practically guaranteed!