This product is a set of six vintage First Discovery Books by Scholastic, Incorporated, focusing on the topic of castles in the architecture genre. The books are part of the First Discovery Book Series and were published between 1993-1998. Written in English with illustrations by Millet, the books are hardcover and have a compact size of 7.2 inches in length, 6.3 inches in width, and 0.4 inches in height. Each book contains 24 pages and weighs 7.1 ounces, making them perfect for home schooling or other educational purposes.