This card pack is a great addition to any fan's collection of The 39 Clues book series, specifically for books 7 and 8, The Rise of the Madrigals. It contains manuscript and index cards that can be used for note-taking or as a reference while reading the books.

The pack comes in a quantity format and is in English language only. It weighs 4 oz and has a length of 7.8in, width of 5.3in, and height of 0.7in. The intended audience for this item ranges from ages under 2 years old to ages 9-12. It was published by Scholastic Inc. in 2010 and falls under the genre of juvenile fiction with topics in historical and general and action and adventure.