Teen Girl Mystery

Seventeen years ago, Layla Trello was murdered and her killer was never found. Enter true-crime fan Piper Gray, who is determined to reopen Layla’s case and get some answers. With the help of Jonas—who has a secret of his own—Piper starts a podcast investigating Layla’s murder. But as she digs deeper into the mysteries of the past, Piper begins receiving anonymous threats telling her to back off the investigation, or else. The killer is still out there, and Piper must uncover their identity before they silence her forever.

Fourteen-year old Sophronia is the bane of her mother's existence. More interested in dismantling clocks and climbing trees than proper etiquette at tea - and god forbid anyone see her atrocious curtsy - Mrs. Temminnick is desperate her daughter become a proper lady. She enrolls Sophronia in Mademoiselle Geraldine's Finishing Academy for Young Ladies of Quality.

But little do Sophronia or her mother know that this is a school where ingenious young girls learn to finish all right - but it's a different kind of finishing.

Trixie can't believe she's stuck in Sleepside all sumemr while her lucky brothers are away at camp. Then a millionaire's daughter moves in next door, a runaway kid hides out nearby, and rumors heat up that the old mansion on the hill is filled with a fortune. Maybe the summer won't be so boring after all!

When Cammie Morgan arrives at her friend Macey's five star hotel for the Democratic National Convention - where Macey's father is about to receive the vice presidential nomination - she thinks she's in for an exciting end to her summer break. But if you're a Gallagher Girl, "exciting" and "deadly" are never far apart.

Emily the Strange: 13 years old. Able to leap tall buildings, probably, if she felt like it. More likely to be napping with her four black cats; or cobbling together a particle accelerator out of lint, lentils, and safety pins; or rocking out on drums/ guitar/ saxophone/ zither; or painting a swirling feral sewer mural; or forcing someone to say "swirling feral sewer mural" 13 times fast.... and pointing and laughing.

Amsterdam, 1943. Hanneke spends her days procuring and delivering sought-after black market goods to paying customers, her nights hiding the true nature of her work from her concerned parents, and every waking moment mourning her boyfriend, who was killed on the Dutch front lines when the Germans invaded. She likes to think of her illegal work as a small act of rebellion.

Mara Dyer believes life can't get any stranger than waking up in a hospital with no memory of how she got there. It can. She believes there must be more to the accident she can't remember that killed her friends and left her strangely unharmed. There is. She doesn't believe that after everything she's been through, she can fall in love. She's wrong.

Jules' family moves into an old abandoned house. Her parents love it, but she's frightened and feels a sense of foreboding. When she sees a pale face in an upstairs window, she can't stop wondering about the eerie presence on the top floor - in a room with a locked door. Her fear replaced by fascination, Jules becomes determined to make contact with the mysterious figure and to unlock the door. Past and present intersect as she and her ghostly friend discover the fate of the family who lived in the house all those many years ago.

Alice Ogilvie and Iris Adams became the talk of Castle Cove when they cracked the biggest case of the fall: the death of Brooke Donovan. Together, the Agathas put Brooke's killer away for good, and since then things around town have been almost back to normal. Quiet, even. But if Alice and Iris know anything, it's that sometimes quiet is just the calm before the storm. The truth is, Brooke's disappearance wasn't the first mystery to rock Castle Cove, and it won't be the last.

Covered by vines and hidden by trees, the old gatehouse on the edge of the woods has been abandoned for years. But when Trixie and her pal Honey explore it, they discover more than just dust and spiderwebs inside. The two girls find a huge diamond stuck in the dirt floor! Could a ring of jewel thieves be hiding out in Sleepyside?

After spending the summer at home in Connecticut, Emmy is eager to return to her friends at Wellsworth. Before she leaves, she receives a key to a safety-deposit box and a letter from her father, telling her to hide the surviving relics and to trust no one. When she returns to school, she realizes her best friend, Lola, is being framed by the Order for a crime she didn't commit. Jonas informs Emmy if she gives up her father, he'll set things right. It all comes to a head at an exhibit on Medieval manuscripts at the British Library. Will Emmy be able to stop them once and for all?

Tana lives in a world where walled cities called Coldtowns exist. In them, quarantined monsters and humans mingle. But once you pass through Coldtown's gates, you can never leave. One morning, after a perfectly ordinary party, Tana wakes up surrounded by corpses. The only other survivors are her exasperatingly endearing ex-boyfriend, infected and on the edge, and a mysterious boy burdened with a terrible secret. Shaken and determined, Tana enters a race against the clock to save the three of them by going straight to Coldtown's opulent heart.

1426, Joseon (Korea). Hwani's family has never been the same since she and her younger sister went missing and were later found unconscious in the forest near a gruesome crime scene. Years later, Detective Min - Hwani's father - learns that 13 girls have recently disappeared from the same forest that nearly stole his daughters. He travels to their hometown on the island of Jeju to investigate...only to vanish as well.

FOR PAULA, ACCOMPANYING her merchant father on a trading voyage to Istanbul is a dream come true. They have come to this city of trade on a special mission to purchase a most rare artifact—a gift from the ancient goddess, Cybele, to her followers. It’s the only remnant of a lost, pagan cult. But no sooner have they arrived when it becomes clear they may be playing at a dangerous game.

When Cammie Morgan enrolled at the Gallagher Academy, she knew she was preparing for the dangerous life of a spy. What she didn’t know was that the serious, real-life danger would start as soon as her junior year. But that’s exactly what happened two months ago when she faced off against an ancient terrorist organization dead set on kidnapping her.

"Take her out back and finish her off." She doesn’t know who she is. She doesn’t know where she is, or why. All she knows when she comes to in a ransacked cabin is that two men are arguing over whether or not to kill her.And that she must run.

The last thing Cammie Morgan remembers is leaving the Gallagher Academy to protect her friends and family from the Circle of Cavan - an ancient terrorist organization that has been hunting her for over a year. But when Cammie wakes up in an Alpine convent and discovers that months have passed, she must face the fact that her memory is now a black hole. The only traces left of Cammie’s summer vacation are the bruises on her body and dirt under her nails, and all she wants is to go home.

Revised edition: This edition of The Casquette Girls includes editorial revisions.

Cammie Morgan has lost her father and her memory, but in the heart-pounding conclusion to the bestselling Gallagher Girls series, she finds her greatest mission yet. Cammie and her friends finally know why the terrorist organization called the Circle of Cavan has been hunting her. Now the spy girls and Zach must track down the Circle's leaders and stop them before they can implement a master plan that will change Cammie - and her country - forever.

Sixteen-year-old Alice is spending the summer in Paris, but she isn't there for pastries and walks along the Seine. When her grandmother passed away two months ago, she left Alice an apartment in France that no one knew existed. An apartment that has been locked for more than 70 years. Alice is determined to find out why the apartment was abandoned and why her grandmother never once mentioned the family she left behind when she moved to America after World War II. With the help of Paul, a charming Parisian student, she sets out to uncover the truth.