Mystery at Manatee Key

Bella and Britt discover a manatee smuggling ring at Manatee Key. The manatees have already been netted, so the girls must act fast! But a kidnapper snatches Bella, hustling her into their hideout, where the ranger is held, too. Now it's up to Britt. But what can one girl do?
Suggested age range for readers: 7-10