Princess Ellie to the Rescue by Diana Kimpton
These fun-filled illustrated adventures, featuring the feisty Princess Ellie are full of authentic pony facts and sparkly princessy detail!All Princess Ellie ever thinks about is riding and helping out at the royal stables when Sundance, one of her beloved ponies, goes missing. Ellie is sure that the mysterious girl in the woods must have something to do with it. She must solve the mystery and rescue Sundance before it's too late.