Ecological Mysteries Books in Order

When a robin dies on the mayor's porch, eighth-grader Tony Isidoro investigates. Following environmental clues leads him beyond a single bird's death to the pollution and disrupted natural relationships affecting his community.

Liza Poole and her mother live in an Everglades hammock where an alligator called Dajun helps keep the ecosystem balanced. When officials order his destruction and he disappears, Liza sets out to find him.

At a research station, twelve-year-old Maggie investigates insects that grow abnormally and then die. With computer-savvy Mitch's help, she explores possible environmental causes and tries to solve the mystery behind their deaths.

Spinner catches a cutthroat trout in the Snake River where that kind of fish is thought to have disappeared. She and her cousin Al head into the mountains to investigate, confronting dangerous weather, terrain, and wildlife.