"Nina is used to feeling like the odd one out, both at school and in her large family. But while trying to fit in at summer camp, she discovers something even more peculiar: two majestic birds have built a nest in the marsh behind an abandoned infirmary. They appear to be whooping cranes, but that's impossible--Nina is an amateur bird-watcher, and all her resources tell her that those rare birds haven't nested in Texas for over a hundred years. When...

While his mother waits for a life-saving heart transplant, eleven-year-old Graham Dodds sets out to find an endangered Snail Kite in the Florida Everglades.

Thirteen-year-old Teddy Fitzroy and his girlfriend, Summer, investigate when a mountain lion is accused of killing a prized dog outside of FunJungle Wild Animal Park in the Texas Hill Country.

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

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

Afraid to ask Crocodile why he is crying, a black rhinocerous and a tik tik bird ask a series of endangered animals if they know.

The Aldens are off to the rain forests of Sumatra, where a protected piece of land is home to endangered animals such as orangutans, elephants, and tigers, but when part of the forest is cut down, they have to figure out who is responsible.

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.

Pepe the prairie dog is entrusted by his grandfather with a mission to visit endangered animals around the world and invite them to join a "Club for Animals Who Want to Continue to Exist."

Although the other animals also feel threatened by the encroachment of humans, only Rundi and Coati journey north in search of a safer place to live.