Written by Christine Pullein-Thompson, the books are part of the beloved Collins Pony Library series and feature thrilling mysteries and adventures. The hardcover books are in great vintage condition and make for a charming addition to any bookshelf. With their original English language and intended audience of ages 9-12, these books are sure to provide hours of entertainment for readers young and old. Don't miss out on the chance to own a piece of literary history with these two classic novels.