As a Young Scientist, twelve-year-old Addie studies pollution in the lake where her twin brother recently drowned, while secretly continuing his investigation of the creature he believed lives in the lake's depths.

Myrtle Hardcastle would rather stay at home to keep close tabs on criminals and murder trials than go on a relaxing vacation with her aunt Helena. Once on board the luxurious private railway coach, Myrtle is thrilled to meet Mrs. Bloom, a professional insurance investigator who is tasked with protecting the priceless Northern Lights tiara. But before the train reaches its destination, both the tiara and Mrs. Bloom vanish. Then a dead body is discovered...

Trevor, Nick, and Robyn are given detention for their role in a food fight, but they're more interested in discovering who's been stealing their lunches and some rare books.

The mummy of King Tut's grandmother is the main attraction at the Fogville museum, but Echo the bat and his human friends, the Bat Pack, discover that at night she is rising from her sarcophagus--can they find a way to bring peace to this restless mummy?

"A long-abandoned--and long-haunted--summer camp sets the stage for the sequel to Camp Murderface, perfect for fans of old school scare masters like R.L. Stine and Christopher Pike."--Provided by publisher.

"Jovie is adrift. She'd been feeling alone ever since her best friend, Micah, left her behind for a new group of friends--but when Micah went missing last fall, Jovie felt truly lost. Now, months later, the search parties have been called off, and the news alerts have dried up. There's only Jovie, biking around Far Haven, Washington, putting up posters with Micah's face on them, feeling like she's the only one who remembers her friend at all. This...

In the late 1800s, a twelve-year-old nightspirit living in the Great Smoky Mountains despairs as homesteaders destroy her forest habitat, until a chance encounter with a "day-folk" man changes everything she thought she knew about her people--and their greatest enemy.

"Cruz and his fellow recruits tackle challenging missions to dispense life-saving medication to gorillas, thwart pangolin poachers, and capture images of the last known cheetahs in Namibia--all the while discovering that protecting the world's threatened species is a dangerous business. Things turn deadly for Lani, Sailor, Emmett, and Cruz as they search for the fourth piece of Cruz's mom's cipher. Cruz knows it's not going to be easy, but will an...

Nine-year-old Shelby Holmes and eleven-year-old John Watson team up again, this time to investigate the new science teacher at the Harlem Academy of the Arts.

In this third book in the exceptional Curiosity House mystery series by bestselling author Lauren Oliver and mysterious recluse H. C. Chester, four children must uncover the evil Nicholas Rattigan's newest dastardly scheme, wage war with a rival freak show, and deal with a spy who may have infiltrated their happy home. Sam, Philippa, Thomas, and Max have just started to recover from their capture and subsequent escape from Rattigan. But the children's...