The product is a lot of 15 trade paperback books from the Nat Geo Kids Book series, featuring various topics such as environment, nature, animals, and pets. The books are illustrated and written in English by the National Geographic Learning Staff. The intended audience for these books is young adults and children aged 4-12, making them a great addition to any young reader's collection. Weird but true! gross is in acceptable condition. All other books are good to like new condition. Book mark included.