Nick and his friend Marta decide to investigate when a mysterious fire starts near a Florida wildlife preserve and an unpopular teacher goes missing.

After hearing that people are planning to kill a mountain lion in the wilds near her neighborhood, twelve-year-old Izzie decides that it is her duty to protect the animal.

After a fire kills her parents, eleven-year-old Martine must leave England to live with her grandmother on a wildlife game reserve in South Africa, where she befriends a mythical white giraffe.

On a vacation to Padre Island, the Aldens help the endangered sea turtle--and solve a mystery.

"Thirteen-year-old Tristan Hunt has enough to worry about with girl troubles, his parents, and trying to keep his extraordinary underwater abilities a secret. But when Tristan and his similarly gifted friends are called upon to investigate the disappearance of stingrays and other ocean life in the waters off Grand Cayman, the stakes are higher than they've ever been before"--

After a summer of tagging sharks off the west coast of Florida, Sabina, Maribel, and Luke have a new assignment: searching for "survivor trees" that are resistant to the disease that is destroying the state's citrus trees; the search takes them to the remote mangrove islands of Sanibel Island, where they discover Spanish oranges, a grave, an immense saltwater crocodile, a reclusive woman who believes that the ghost of a dead king, beheaded by Spanish...