I bought this for my 5 year old who has caught the Pony riding bug from her friends at School. We wanted her to learn about everything behind owning and riding a Pony before we committed to lessons for her. She finds the book easy to read, not too many big words and there are also plenty of pictures.
The book covers everything from types of horse thorugh to riding styles and eventually on to owning and caring for the horse/pony. I'm not an expert but this seems to be a very comprehensive yet digestible read for a young girl. The quality of the book is great, it's a paperback but as with all Usborne books the quality is high, glossed thick pages which don't get damaged easily.
All in all it's a perfect book for the purpose.