In 1925, fourteen-year-old Ida Bidson secretly takes over as the teacher when the one-room schoolhouse in her remote Colorado area closes unexpectedly.

"Bryce and Ashley Timberline's friend Jeff is dying, and his collection of autographed sports memorabilia has disappeared. While Bryce and Jeff attempt a 200-mile bike hike for cancer research, Ashley does a little research of her own." --Page 4 of cover.

Everywhere they turn, Ashley and Bryce find mysteries. Ashley seems to have a secret admirer. Bryce notices a suspicious vehicle near their home and school. When Bryce investigates, he comes face-to-face with a person he never expected to meet!

"An unfamiliar car runs Bryce Timberline off a back road. He and Ashley discover a secret that puts them in a race against time to save lives. Will they be able to get help without becoming victims themselves?"

"Eighth grade is supposed to be the best year in middle school, but after the new principal takes away the most fun thing in their lives, things go from bad to worse. Bryce encounters internet threats, Ashley is stuck with the school bully, and they suddenly find themselves separated. Things can't get worse . . . or can they?"--Back cover.

"Bryce and Ashley are among a handful of students chosen to compete in a special tournament at a mountainside college. When Ashley discovers that a student is missing, she and her brother investigate and find that there's more to the story than first appears."--Back cover.

Twelve-year-old Coco Hidden has grown up in her mother's chocolate shop in Colorado, along with her friend Leo de la Cueva, but recently things have not been going well; the shop is failing, and Leo is hanging out with the other boys, and barely wants to talk to her--but when they both win a culinary contest, the two children and their mothers find themselves on a trip to the Amazon in Ecuador, where Coco hopes to find the rare ceiba tree, and where...

When Arlo Finch moves to Pine Mountain, Colorado, he has no idea what's in store for him in this tiny town full of mystery and magic. When he joins the Rangers, Pine Mountain's version of the Boy Scouts, it leads him into adventures he never thought possible. Wilderness and magical powers collide throughout the beautiful, dense forest surrounding his new home, and as Arlo begins to learn the way of the Rangers, he also discovers courage, strength,...

Cousins Mike and Kate investigate after someone threatens to tamper with the scoreboard right before the Colorado Rockies' season opener.

In 1880, Noah's aunt teaches the reluctant nine-year-old how to read as they explore the Colorado prairie together, Noah pushing Aunt Dora in her wheelchair.