Teen Girl Detective

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.

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.

After staking out, obtaining, and then being forced to give up her first boyfriend, Josh, all Cammie Morgan wants is a peaceful semester. But that's easier said than done when you're a CIA legacy and go to the premier school in the world...for spies. Cammie may have a genius I.Q., but there are still a lot of things she doesn't know. Like, will her ex-boyfriend even remember she exists? And how much trouble is she really in after what happened last semester? And most of all, why is her mother acting so strangely?

Shortly before her 17th birthday, Emma discovers she has a long-lost twin named Sutton Mercer. She contacts Sutton, who agrees to a rendezvous but never shows up. Curious at first, Emma slips into Sutton's ultra-glamorous life, assuming her identity. When it becomes clear that Sutton is not coming back, that someone made sure she never could, Emma plunges in to investigate who could have wanted her sister gone (a fairly long list, she discovers).

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?

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.

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.

Something’s rotten in Apple country! Hildy Biddle is a high school reporter eager to stand up for the truth. She’s just waiting for a chance to prove herself as a journalist, and yearning for a big story. The trouble is, the town’s biggest story stars...a ghost. Not a very easy interview! This ghost has the town in a tizzy, and the local paper is playing up people’s fears with shocking headlines of eerie happenings and ghostly sightings. Hildy’s determined to discover what’s really going on, but her desire to uncover the truth is making some people awfully nervous.

Jim Frayne has run away from Sleepyside, before Trixie could tell him that he is the sole heir to a huge fortune. With her best friend, Honey, Trixie sets out in a trailer across upstate New York to track Jim down...and stumbles upon another mystery along the way!

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!

In the peaceful seaside town of Cape Bonita, wicked secrets and lies are hidden just beneath the surface. But all it takes is one tragedy for them to be exposed. The most popular girls in school are turning up dead, and Penelope Malone is terrified she's next. All the victims so far have been linked to Penelope—and to a boy from her physics class. The one she's never really noticed before, with the rumored dark past and a brooding stare that cuts right through her. There's something he isn't telling her. But there's something she's not telling him, either.

Trixie has been friends with Diana Lynch for years, even before Di's family became fabulously rich. When a long-lost uncle shows up at the Lynches' doorstep and starts ruining Di's social life, Di asks Trixie for help. But Trixie thinks Uncle Monty isn't just an annoying relative, she thinks he's an imposter!

It's senior year at St. Joan's Academy, and school is a pressure cooker. College applications, the battle for valedictorian, deciphering boys' texts: Through it all, Colleen Rowley and her friends are expected to keep it together. Until they can't. First it's the school's queen bee, Clara Rutherford, who suddenly falls into uncontrollable tics in the middle of class. Her mystery illness quickly spreads to her closest clique of friends, then more students and symptoms follow: Seizures, hair loss, violent coughing fits. St. Joan's buzzes with rumor; rumor blossoms into full-blown panic.

Mercy Kaplan doesnt want to be like her mother, saddled with crying kids and failing crops for the rest of her life. Mercy longs to be on her own - until her wish comes true in the worst possible way. It is 1918 and a deadly flu epidemic ravages the country, leaving her utterly alone and penniless.

When Olivia's mother was killed, everyone suspected her father of murder. But his whereabouts remained a mystery. Fast forward 14 years. New evidence now proves Olivia's father was actually murdered on the same fateful day her mother died. That means there's a killer still at large. It's up to Olivia to uncover who that may be. But can she do that before the killer tracks her down first?

Jaycee and Rachel were best friends. But that was before... before that terrible night at the old house. Before Rachel shut Jaycee out. Before Jaycee chose Skyler over Rachel. Then Rachel is found dead. The police blame a growing gang problem in their small town, but Jaycee is sure it has to do with that night at the old house. Rachel's text is the first clue - starting Jaycee on a search that leads to a shocking secret. Rachel's death was no random crime, and Jaycee must figure out who to trust before she can expose the truth.

Calista, Zoe, Holly, and Denise were inseparable best friends when they spent their summers together at sleepaway camp. But after an unexplained tragedy forced the camp to close, the girls drifted apart.

Popular Daphne Blake and über-nerd Velma Dinkley aren't friends. They aren't enemies either. They don't have any reason to speak to each other, and that's how they prefer it. They grew up together - been best friends since pre-K - but when they hit middle school, Daphne dropped Velma and never looked back. These days, Daphne's deep in the popular crowd, daughter of the richest family in town, while Velma's an outsider, hiding from the world behind her thick glasses. But then Daphne's best friend, Marcy - who happens to be Velma's cousin - goes missing.

Eighteen-year-old Addie Blackwood regrets nothing more than one horrible, mistake-filled night last summer. Hours after she hurled the worst words she could think of at her sister, Fiona was found dead at the bottom of a ravine. The police ruled her death an accident, but Addie’s never bought it. Her ballet-prodigy sister didn’t slip and fall; she was pushed. And Addie’s number one suspect: Thatcher Montgomery, the rich kid down the street who always had a thing for Fiona. But when Thatcher is found dead in the same ravine, Addie must admit she was wrong.