Detectives' Row is full of talented investigators, but Toby Montrose isn't one of them. He's only an assistant at his uncle's detective agency, and he's not sure he's even very good at that. Toby's friend Ivy is the best sleuth around -- or at least she thinks so. They both see their chance to prove themselves when the famed Hugh Abernathy announces a contest to choose the World's Greatest Detective. But when what was supposed to be a game turns into...

"No one knows who killed Mrs. Donaldson, or where she hid her fortune.  When Logan and his family move into her old house, Logan is dragged into trying to solve the mystery of his new friend, Arthur.  The pursuit of clues leads them straight into trouble, and ultimately to a derelict and creepy amusement park.  But little do the boys suspect that the closer they get to the truth, the more danger they're in..."--Back cover.

Now that troubled Thayer Vega is back in town, Emma Paxton must struggle to figure out the relationship her twin has with him...and whether he may have been the one to kill her.

Thirteen-year-olds Cooper Goodman and Justice and Liberty Gordon investigate the eccentric residents of Windy Bottom, Georgia, after the remains of Coop's long-missing grandmother are uncovered and his Gramps is the prime suspect.

"Sutton Mercer had the perfect life, great friends, and a gorgeous boyfriend...until someone murdered her. Then the killer forced Sutton's long-lost twin sister, Emma, to pretend to be her. Now Sutton can only watch from beyond the grave as Emma frantically tries to figure out who killed her sister, and why. But when Sutton's body is discovered, Emma's time is up--and she becomes the number-one suspect herself"--Publisher's statement on Amazon.com....

Possessing an ability to hide on the edge of perception, Julia conceals her talents in a city where magic is banned and poses as a grand lady's housemaid alongside an eccentric band of fellow housemates who have ties to a powerful killer.

Like her idol Sherlock Holmes, eighth grader Ingrid Levin-Hill uses her intellect to solve a murder case in her home town of Echo Falls.

When she drops out of school and struggles to start a career on Broadway in the fall of 1950, seventeen-year-old Kit Corrigan accepts help from an old family friend, a lawyer said to have ties with the mob, who then asks her to do some favors for him.

"A murder mystery in a small town raises suspicions when a member of a well-regarded family in the community is implicated"--

As a nearly full-fledged member of the Agency, the all-female detective unit based in Miss Scrimshaw's Academy for Girls, Mary Quinn, disguised as a poor apprentice builder, must brave the sinister underworld of Victorian London in order to unmask a murderer.