These books are collections of our most popular, quick, fun, thinking puzzles. The wide variety of activities in each book develop reading comprehension, vocabulary, and mathematical reasoning as well as writing, spatial, and visual perceptual skills. They also build deductive, inductive (inferential), and creative thinking skills. The puzzles are perfect for school, home, and travel. They are very popular as brain-start, extra credit, sponge, or reward activities. Each book includes easy-to-follow directions and answers. Try one and you'll be hooked!