With an intriguing mystery, a timely message about protecting the environment, and Jean Craighead George’s award-winning, accessible writing, Who Really Killed Cock Robin is the perfect eco mystery kids—and educators—are sure to love. Citizens of Saddleboro are mourning the mysterious death of their beloved mascot, Cock Robin. Tony suspects there’s more to the story than people assume. The truth must be hidden in the The town park is overrun with trillions of ants; nights are quiet because the frogs stopped singing; the nearby river contains a dangerous amount of an unknown chemical; and the town dump is emitting strange fumes. What does it all add up to? There’s a story here, and it’s up to Tony to figure out who really killed Cock Robin.

Vanished? Liza Poole lives with her mother in one of the last balanced ecosystems in North America—the Gumbo Limbo Hammock deep within the lush kingdom of the Florida Everglades. Some may think it strange to live outdoors, but Liza feels lucky to live it strange to live outdoors, but Liza feels lucky to live in her small yellow tent amidst tropical birds and exotic plants. And at the center of this natural paradise lies Dajun, the majestic alligator who protects Gumbo Limbo's environment. Then, one day, a state official arrives with frightening orders. Dajun is scaring people nearby—he must be killed! Liza takes action to save the invaluable 'gator, but suddenly, he is nowhere to be found. Now, she must find Dajun before it's too late, and her search will lead her into the heart of an exciting eco mystery!

"When a raven, flies at you, there will, be a murder." That's what Maggie's grandmother once told her, and the longer twelve-year-old Maggie stays with her parents at the Biological Research Station—or Bug Camp, as she calls it—the more she believes it. Soon after a raven's appearance, something strange happens to Maggie's beautiful new fire bugs. Instead of molting into the next stage, the bugs grow grotesquely large and seem to be doomed. Is global warming the culprit? Acid rain? Or...murder? One thing is certain—it's an eco mystery, and Maggie, with the help of Mitch, a young computer whiz, must try to track down the killer.In this environmental whodunit, 12-year-old Maggie can't figure out why her exotic and beautiful new fire bugs are dying so suddenly. Is it global warming, acid rain, or murder? With the help a young computer whiz, Maggie tracks down each ecological clue in a mystery that is ‘fascinating and (especially for budding naturalists) inspiring."K.

This mystery begins when Spinner, a New York City native who would rather pirouette than fly cast, catches the family prize––much to her boy cousins' dismay. The prize fish, a huge cutthroat trout, had been thought to be extinct in the river, and Spinner and her cousin set out to solve the mystery of how this one spectacular cuttroat survived until Spinner reeled him in. HarperCollins is pleased to republish Jean Craighead George’s fourth ecological mystery, which was first published in 1975 as Hook a Fish, Catch a Mountain.