Having used their magic tree house to travel to India, where they must get a gift to help free the dog Teddy from a spell, Jack and Annie have adventures involving a tiger and other endangered jungle animals.

For once, operations at the enormous zoo/theme park appear to be running smoothly (except for the occasional herring-related mishap in the penguin exhibit) and Teddy Fitzroy is finally able to give detective work a rest. But then a local lion is accused of killing a famous dog--and the dog's owner, an inflammatory radio host, goes on a crusade to have the cat declared a nuisance so it can be hunted. However, there's evidence that the lion might have...

Rick, a fourteen-year-old foster child, escapes from a juvenile detention facility near Las Vegas and travels to Canyonlands National Park in Utah where he meets a bird biologist working on a project to reintroduce condors to the wild.

Cursed by an old carnival game, sixth-grader Rex Dexter uses his new ability to communicate with dead animals to investigate the mysterious deaths of endangered zoo animals.

Unable to control her tendency to burst into flame, twelve-year-old Ember, a dragon transformed into a girl by her foster father, is sent to Antarctica where she tries to save ice dragons from extinction.

As eleven-year-old Joy Wells, proud resident of the nearly-abandoned town of Spooking, tries to stop construction of a water park in a bog she believes is home to a monster and the setting of her favorite horror story, a man with his own mysterious connection to Spooking will do anything to stop her.

"The Aldens head to Ladakh, a territory in northern India, to help save the elusive and critically endangered snow leopard"--OCLC.

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

In his continuing adventures, Freddy, a golden hamster who can read and write, joins his animal and human friends to save a colony of endangered field hamsters from being killed when an automobile plant is constructed on their land.

Rachel and Kirsty must prevent Jack Frost from kidnapping baby animals for his icy zoo while they are at a Nature Reserve.