When the mysterious Glyphmaster tricks Adam into solving a puzzle and then hacks his computers, Adam, Finn, Lewis, and Emily are pulled into a mystery that is more trouble than they ever imagined.

Shay Remby and her gang of renegades have struck a blow to the Singular Corporation by rescuing Shay's brother and Fenfang, a girl who literally knows too much. Can the knowledge brought by these ex-captives help Shay and her friends expose the crimes of this corrupt corporation?

"A math-whiz from a trailer park discovers she's the only student capable of unravelling complex clues left by a serial killer who's systematically getting rid of her classmates"-- Nearly Boswell knows how to keep secrets. Living in a DC trailer park, she knows better than to share anything that would make her a target with her classmates. But when a serial killer goes on a killing spree and starts attacking students, leaving cryptic ads in the newspaper...

While helping the Portland County Sheriff's Search and Rescue to seek a missing autistic man, teens Alexis, Nick, and Ruby find, instead, a body and join forces to find the girl's murderer, forming an unlikely friendship, as well.

After solving the murder case together, Ravi Singh helped Pip create a podcast that soon went viral, but they both swear off sleuthing. When Jamie Reynolds goes missing on the sixth anniversary of the deaths of Andie Bell and Sal Singh, however, Pip feels it's too big of a coincidence to ignore. With the spotlight on her, can she still follow the clues and uncover even more sinister depths to her hometown?

Pippa no quiere dedicarse a la investigación: el precio a pagar es demasiado alto. Después de resolver el asesinato de Andie Bell, Pippa decidió cerrar esa etapa para siempre. Y, aunque el pódcast que grabó con Ravi sobre el caso se ha hecho viral, insiste en que sus días de detective quedaron atrás...O eso es lo que ella cree. Porque cuando Jamie Reynolds desaparece y la policía no logra encontrarlo, a Pippa no le queda más remedio que volver...

"Seventeen-year-old Cassie, who has a natural ability to read people, joins an elite group of criminal profilers at the FBI in order to help solve cold cases"--