A special day camp lets three cousins get a look at what happens behind the scenes at the zoo, which helps them solve a mystery involving an escaping pet snake and a missing diamond ring.

The Mystery of the Zoo Camp 1997, Bethany House Publishers, Minneapolis, MN

ISBN-13: 9781556618529

Trade paperback

Mystery of the Zoo Camp 1997, Turtleback Books

ISBN-13: 9780613233842

Turtleback School & Library edition