The Happy Hollisters and the Castle Rock Mystery. By Jerry West, Illustrated by Helen S. Hamilton, Doubleday & Co., Inc., Garden City, New York, 1963.
 
Juvenile Fiction - Mystery
Book #23 of 33: The Happy Hollisters
Vintage from the 1960's
See Table of Contents
 
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 their front lawn, the Hollisters are baffled and very excited. Just what is the meaning of the orange parachute and its dangling white box? The Hollisters connect the balloon with the strange lights which have been appearing at night over their Shoreham home, and once again they start off on a trail of detection.
 
Hardcover book. Red cover with black title & small art depiction near the bottom corner of the front, and a yellow top edge. Secure binding with a shifted spine and clean pages. Nice jacket in a protective cover.