The Aldens investigate when exotic and endangered animals begin to disappear from the zoo where their new friend Lindsey works.

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.

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 Reading level: RL 2.3 ; Ages: 6-9

"While studying wolverines on a wildlife sanctuary in Montana, biologist Alex Carter is run off the road and threatened by locals determined to force her off the land. Undeterred in her mission to help save this threatened species, Alex tracks wolverines on foot and by cameras positioned in remote regions of the preserve. But when she reviews the photos, she discovers disturbing images of an animal of a different kind: a severely injured man seemingly...

"Of all the Rescue Bots, it's Boulder who has the kindest heart. So when he discovers an endangered species of woodpeckers living in Griffin Rock, he goes to extremes to protect them-even when it means going up against the mayor!"--