Young Adult Fiction Mystery

Trinity Marrow has lost the battle and her beloved Protector. Even with both demons and Wardens on her side, Trin may not win the war against the Harbinger. Bringing Lucifer back to the world to fight the Harbinger is probably a really, really bad idea, but they're out of options—and the world's ultimate fallen angel is the only being powerful enough to impact the outcome. As Trin and Zayne form a new and more dangerous bond and Lucifer unleashes Hell on earth, the apocalypse looms and the world teeters on the end of forever. Win or lose, nothing will ever be the same.

Blythe and her friends — Gabrielle, and brother and sister Tucker and Tanya — have always been a tight friend group, attending a local high school and falling in and out of love with each other. But an act of violence has caused a rift between Blythe and Tucker . . . and unexpected bursts of aggression and disturbing nightmares have started to become more frequent in their lives.

What was once the Western United States is now home to the Republic, a nation perpetually at war with its neighbors. Born into an elite family in one of the Republic's wealthiest districts, 15-year-old June is a prodigy being groomed for success in the Republic's highest military circles. Born into the slums, 15-year-old Day is the country's most wanted criminal. But his motives may not be as malicious as they seem. From very different worlds, June and Day have no reason to cross paths - until the day June's brother, Metias, is murdered and Day becomes the prime suspect.

Some time has passed since the inimitable quartet of Reynie, Sticky, Kate, and Constance have had a mission together. But with the arrival of a new Society member - and a new threat - they must reunite to face dilemmas more dangerous than ever before, including the villainous Mr. Curtain and a telepathic enemy tracking their every move, not to mention a dramatically preteen Constance. In its triumphant return, the Society encounters all new challenges, but the series' trademark sly humor, sweet camaraderie, hairsbreadth escapes, and mind-bending puzzles are all as engaging as ever.

Newt has been to hell and back with his friends. The Glade. The Maze. The Scorch. The inner halls of WICKED. But now he has a burden that can't be shared with Thomas and the others - the Flare. And Newt can't bear the thought of his friends watching him descend into madness as he succumbs to the virus.

Romance was not part of Nora Grey's plan. She's never been particularly attracted to the boys at her school, no matter how hard her best friend, Vee, pushes them at her. Not until Patch comes along. With his easy smile and eyes that seem to see inside her, Patch draws Nora to him against her better judgment. But after a series of terrifying encounters, Nora's not sure whom to trust.

Sam is dreading senior ski weekend and having to watch after her brother and his best friend, Gavin, to make sure they don’t do anything stupid. Again. Gavin may be gorgeous, but he and Sam have never gotten along. Now they’re crammed into an SUV with three other classmates and Gavin’s dog, heading on a road trip that can’t go by fast enough.

Seventeen-year-old Vane Weston has no idea how he survived the category-five tornado that killed his parents. And he has no idea if the beautiful, dark-haired girl who's swept through his dreams every night since the storm is real. But he hopes she is....

It is freezing in the churchyard, even before the dead arrive. Every year, Blue Sargent stands next to her clairvoyant mother as the soon-to-be dead walk past. Blue herself never sees them - not until this year, when a boy emerges from the dark and speaks directly to her. His name is Gansey, and Blue soon discovers that he is a rich student at Aglionby, the local private school. Blue has a policy of staying away from Aglionby boys. Known as Raven Boys, they can only mean trouble. But Blue is drawn to Gansey, in a way she can't entirely explain.

Twelve-year-old criminal mastermind Artemis Fowl has discovered a world below ground of armed and dangerous—and extremely high-tech—fairies. He kidnaps one of them, Holly Short, and holds her for ransom in an effort to restore his family's fortune. But he may have underestimated the fairies' powers. Is he about to trigger a cross-species war?

With a dad who disappeared years ago and a mother who's a bit too busy to parent, Emmy is shipped off to Wellsworth, a prestigious boarding school in England, where she's sure she won't fit in. But then she finds a box of mysterious medallions in the attic of her home - medallions that belonged to her father...who may have gone to Wellsworth.

Seventeen-year-old Cassie Hobbes has a gift for profiling people. Her talent has landed her a spot in an elite FBI program for teens with innate crime-solving abilities, and into some harrowing situations. After barely escaping a confrontation with an unbalanced killer obsessed with her mother's murder, Cassie hopes she and the rest of the team can stick to solving cold cases from a distance. But when victims of a brutal new serial killer start turning up, the Naturals are pulled into an active case that strikes too close to home.

Ellingham Academy must be cursed. Three people are now dead. One, a victim of either a prank gone wrong or a murder. Another, dead by misadventure. And now, an accident in Burlington has claimed another life. All three in the wrong place at the wrong time. All at the exact moment of Stevie's greatest triumph.... She knows who Truly Devious is. She's solved it. The greatest case of the century.

The lovable underdog Lewis Barnavelt and his best friend, Rose Rita, are at it again - investigating the curious (and possibly supernatural?) goings-on in their town of New Zebedee. They get more than they bargained for when a new family moves into the Hawaii House, one of the oddest-looking houses in town, and Lewis and Rose Rita are drawn into a mystery involving forces far beyond the shores of their imagination. Why are there strange drumbeats emanating from the top floor of the Hawaii House? And why is Lewis having dreams about Pele, the Hawaiian goddess of fire?

After a string of brutal murders in Las Vegas, Cassie Hobbes and the Naturals are called in to investigate. But even with the team's unique profiling talents, these murders seem baffling: unlike many serial killers, this one uses different methods every time. All of the victims were killed in public, yet the killer does not show up on any security feed. And each victim has a string of numbers tattooed on their wrist. Hidden in the numbers is a code—and the closer the Naturals come to unraveling the mystery, the more perilous the case becomes.

Sara Martinez is a hacker. She recently broke into the New York City foster care system to expose her foster parents as cheats and lawbreakers. However, instead of being hailed as a hero, Sara finds herself facing years in a juvenile detention facility and banned from using computers for the same stretch of time. Enter Mother, a British spy who not only gets Sara released from jail but also offers her a chance to make a home for herself within a secret MI5 agency. Operating out of a base in Scotland, the City Spies are five kids from various parts of the world.

Amateur sleuth Stevie Bell needs a good murder. After catching a killer at her high school, she’s back at home for a normal (that means boring) summer. But then she gets a message from the owner of Sunny Pines, formerly known as Camp Wonder Falls - the site of the notorious unsolved case, the Box in the Woods Murders. Back in 1978, four camp counselors were killed in the woods outside of the town of Barlow Corners, their bodies left in a gruesome display.

A mysterious island. An abandoned orphanage. A strange collection of very curious photographs. As our story opens, a horrific family tragedy sets 16-year-old Jacob journeying to a remote island off the coast of Wales, where he discovers the ruins of Miss Peregrine’s Home for Peculiar Children. As Jacob explores its abandoned bedrooms and hallways, it becomes clear that the children were more than just peculiar. They may have been dangerous. And somehow—impossible though it seems—they may still be alive.

It’s been almost two years since Simon died in detention, and the aftermath has been hard to shake. First the Bayview Four had to prove they weren’t killers. Then a new generation outwitted a vengeful copycat. Now the entire Bayview Crew is back home for the summer, and everyone is trying to move on. Only, this is Bayview, and life is never that simple.

It's a tough job, but somebody's got to do it. Guts, glory, danger, and sacrifice are all in a day's work for Hank the Cowdog, Head of Ranch Security. While investigating a murder on the ranch, Hank finds himself the number-one suspect.