The Happy Hollisters and the Castle Rock Mystery (#23 in the Happy Hollisters series)An abandoned rock quarry, mysterious flying objects, and a valuable deposit of titanium lead the five Hollister children-Pete, Pam, Ricky, Holly, and Sue-into their latest thrilling adventure.When...
An abandoned rock quarry, mysterious flying objects, and a valuable deposit of titanium lead the five Hollister children--Pete, Pam, Ricky, Holly, and Sue--into their latest thrilling adventure. When a package of instruments from a weather balloon is parachuted onto...