The Letter, the Witch, and the Ring

If only Rose Rita could go to camp like her best friend Lewis. She's sure that boys have all the fun – until Mrs. Zimmermann offers Rosa Rita an adventure of her own. Mrs. Zimmermann has inherited a farm, and a ring left there for her is rumored to be magical. She invites Rosa Rita to help her check things out. When the two arrive at the deserted farm, the ring has mysteriously vanished. What power does it have? And who has it now?