Dive right into the ultimate collection of classic mysteries with this amazing twenty-book Boxcar Children set. Join the clever and courageous Alden siblings as they use their incredible teamwork to solve puzzles and crack cases all over the country. Whether they are investigating a spooky old woodshed, searching for hidden treasure on a snowy mountain, or unmasking the secrets of a mysterious houseboat, Henry, Jessie, Violet, and Benny are always ready for action. This massive collection brings together the first nineteen thrilling stories that launched the beloved series, plus a special activity book filled with fantastic puzzles and games. You will have everything you need to become a master detective yourself. Grab your magnifying glass and jump into the adventures that have delighted millions of readers and inspired kids everywhere to imagine, question, and explore the world.