This book is from the Guinness World Records series books. It's a wonderful book for boys or girls. The reading level is grades 2-3, depending upon the reader, but the facts are interesting for older elementary students. Anyone who loves pets and enjoys reading about unusual pets will enjoy this book. From a cliff diving Jack Russell Terrier to a Golden Retriever that can hold five tennis balls in its mouth, there's something interesting for everyone. Meet the cat that is as long as an 8-year old kid to a Belgian draft horse standing at 19 hands. Lots of interesting facts!!!