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

McKenna is losing her vision to Stargardt's disease, but that will not stop her from competing in a rigorous new sled dog race through the Canadian wilderness.

"... a young boy who fears the outdoors becomes lost in the forest ... and discovers not only his courage but a new friend, too."--Provided by publisher.

Nita Dara is one of ten eighth graders who has already won a scholarship to attend the Alaska Young Explorers program and learn explorer skills in an Alaskan wilderness camp; but the program is also a competition and the winner will get 5000 dollars--money that Nita's family could really use--but on the final challenge she is paired with the super-competitive Sohail Aman, and the challenge turns deadly when they find themselves lost in the fog while...

"Frank and Joe are back on Black Bear Mountain, the scene of a previous wilderness adventure and mind-bending mystery. This time, the brothers are checking in on Dr. K, a friend they made during their first trip. Dr. K is a fan of living off the grid, but he's been MIA long enough to cause worry in the small mountain town. And so the teenage detectives Black Bear Mountain relied on before have been called in to help once again. It's not a good start...