When a two-hundred-pound sea turtle goes missing from the Bayport Aquarium, Frank and Joe Hardy investigate, discovering a network of underground tunnels hidden beneath Bayport that is aiding a sinister smuggling ring.
- ISBN10 148140010X
- ISBN13 9781481400107
- Publish Date 21 October 2014
- Publish Status Active
- Imprint Aladdin Paperbacks
- Format Hardcover
- Pages 128
- Language English