Who Is the Sender?

Maddie, a teen stuck in the afterlife investigating her own mysterious disappearance, goes on a crime-solving journey as she adjusts to high school purgatory, but the closer she gets to discovering the truth, the more secrets and lies she uncovers.

The story of what happens when five high schoolers walk into detention and only four make it out alive. Everyone is a suspect, and everyone has something to hide.

Based on the Pretty Little Liars series of young adult novels by Sara Shepard, the series follows the lives of four girls — Spencer, Hanna, Aria, and Emily — whose clique falls apart after the disappearance of their queen bee, Alison. One year later, they begin receiving messages from someone using the name "A" who threatens to expose their secrets — including long-hidden ones they thought only Alison knew.

When Lucy Albright and Stephen DeMarco meet at college, they are at that formative age when seemingly mundane choices lead the way to irrevocable consequences. They quickly fall into an addictive entanglement that will permanently alter not only their lives, but the lives of everyone around them.

A small-town cop suspects that the local school for troubled teens — and its dangerously charismatic founder — may not be all it seems.

Ominous letters. Strange neighbors. Sinister threats. A family moves into their suburban dream home, only to discover they've inherited a nightmare.

After discovering she's inherited a remote island in Canada from the estranged grandfather she was never allowed to meet, 17-year-old Annie Jacobson decides to investigate, pulling her into a world of buried secrets, unexpected sisterhood, and the complicated family history she was never meant to find.

Nancy Drew makes plans to leave her hometown for college, but finds herself drawn into a supernatural murder mystery instead.

A group of ordinary people who stumble onto a puzzle hiding just behind the veil of everyday life come to find that the mystery winds far deeper than they ever imagined.

Ryan Atwood, a teen from the wrong side of the tracks, moves in with a wealthy family willing to give him a chance. But Ryan's arrival disturbs the status quo of the affluent, privileged community of Newport Beach, California.

When detective Andrea 'Andie' Whitford is transferred to the Victorian High Country, she is thrust into a baffling mystery of five missing persons who have vanished into the wilderness. Through an edge-of-the-seat, high-stakes investigation, Andie uncovers a complex web involving murder, deceit and revenge.

High school student Clay Jensen lands in the center of a series of heartbreaking mysteries set in motion by a friend's tragic suicide.