Another author who started writing very young – in fact she finished writing very young too, unless she wrote under another name. Misty the Grey Pony, part of the Country Life Library, is the life story of a grey Exmoor pony called Misty. It has charming illustrations, though the Exmoors don’t look that much like Exmoors.
Finding the book
Misty is generally cheap, and easy to find as long as you don’t want a dustjacket. Copies with dustjackets can be pricey.