Books in the The Pony-Mad Princess series

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.

Princess Ellie is pony-mad! She loves helping out at the stables and riding her ponies. It's so long since she learned to ride on Shadow, her Shetland pony, that now her feet touch the ground when she's riding him. The King thinks she looks silly and decides to sell Shadow. But Ellie can't bear to lose him. Can she invent a plan to save Shadow?