This Costco-exclusive value set bundles ten classic mystery books from two of children's literature's most iconic series—Nancy Drew, the clever teenage sleuth created by Carolyn Keene, and The Hardy Boys, the adventurous detective brothers created by Franklin W. Dixon—published by Grosset & Dunlap, a beloved imprint of Penguin Random House.

The collection combines the introductory volumes of both series, giving young readers a perfect entry point into the world of mystery and adventure. Nancy Drew titles follow 16-year-old Nancy as she uses her wit and determination to solve puzzling crimes in her hometown of River Heights. The Hardy Boys titles feature brothers Frank and Joe Hardy who assist their detective father on thrilling cases that take them around the world.

These stories have captivated readers for nearly a century and remain perennial bestsellers. Each book in the set features the classic narrative style that has made both series staples in homes, schools, and libraries. The hardcover volumes come packaged in a collectible slipcase box, making this an ideal gift for children ages 8 and up who are developing a love of reading, mystery, and problem-solving.