During a hot-air balloon flight, the Thea Sisters discover that the turtles have vanished from Turtle Island! If that wasn't alarming enough, dangerous drums of a strange oil are spotted off the shore of the island-a disaster waiting to happen! The Thea Sisters are surprised that none other than Vissa De Vissen wants to help them save the island and the turtles! All seems lost until Nicky and Paulina spot a couple of turtles entering a mysterious underground cave! There are mysteries within mysteries, but the Thea Sisters are determined to solve them all and save the day.
- ISBN10 1629914789
- ISBN13 9781629914787
- Publish Date 30 August 2016
- Publish Status Transferred
- Out of Print 22 November 2022
- Publish Country US
- Imprint Papercutz
- Format Hardcover
- Pages 56
- Language English