This antique hardback book titled "Heidi's Children" by Charles Tritton is a valuable addition to any book collection. Published by Grosset & Dunlap in 1939, it is a classic children's book that is sure to delight readers of all ages. The book's author, Charles Tritton, is well-known for his engaging writing style and his ability to captivate readers with his stories. The book's binding is sturdy and will surely last for many more years to come. Its publisher, Grosset & Dunlap, is known for producing high-quality books that are both durable and enjoyable to read. This book falls under the categories of Antiquarian & Collectible and Books & Magazines, making it a rare find for any book enthusiast.