(From the publisher):
While returning from New Mexico to the airport in their rented bus, the Hollister children stop to buy cowboy suits and the children meet Helen and Jack Moore, youngsters about Pete's age, who are staying at a dude ranch near Mystery Mountain. Jack has a map of the cave of the ancient doll makers, then complications set in.
Original title: The Happy Hollisters at Mystery Mountain
Genre: Fiction→ Children & Young Adult→ Mystery