2001 - The Riddle of Penncroft Farm (Paperback) → Hardcover ISBN-13: 9780152164416 ISBN-10: 0152164413 Genre: Children's Books 5 1989 - The Riddle of Penncroft Farm (Hardcover) → Paperback ISBN-13: 9780152005740 ISBN-10: 0152005749 Genre: Children's Books ? |