Nick and his friend Marta decide to investigate when a mysterious fire starts near a Florida wildlife preserve and an unpopular teacher goes missing.

"Wil Greene’s mom has been missing for over a year, and the police are ready to call the case closed—they claim she skipped town and you can’t find a woman who wants to disappear. But she knows her mom wouldn’t just leave…and she knows the family of her former best friend, Elwood Clarke, has something to do with it. Elwood has been counting down the days until his 18th birthday—in dread. It marks leaving school and joining his pastor father...

A series of bizarre events in their home town lead the Hardy Boys on a trail of robbers and kidnappers. "Something is amiss in Bayport, the Hardy boys' hometown. First there is trouble in Shantytown, then a strange black craft tries to ram Joe and Frank's boat, the Sleuth. That night the local bank is robbed. And later that same night the young detectives' pals, Chet Morton and Biff Hooper, mysteriously disappear after a masquerade party. Are the...

"Enola Holmes, much younger sister of detective Sherlock Holmes, must travel to London in disguise to unravel the disappearance of her missing mother."--

Twelve-year-old Maya is the only one in her South Side Chicago neighborhood who witnesses weird occurrences like werehyenas stalking the streets at night and a scary man made of shadows plaguing her dreams. Her friends try to find an explanation--perhaps a ghost uprising or a lunchroom experiment gone awry. But to Maya, it sounds like something from one of Papa's stories or her favorite comics. When Papa goes missing, Maya is thrust into a world both...

After tragic events tear Mickey Bolitar away from his parents, he is forced to live with his estranged Uncle Myron and switch high schools, where he finds both friends and enemies, but when his new new girlfriend, Ashley, vanishes, he follows her trail into a seedy underworld that reveals she is not what she seems to be.

"Following clues left by their missing father, twelve-year-old twins Bickford and Rebecca Kidd sail from the Caribbean to New York City with their siblings to finish the dangerous quest of their world-famous treasure-hunting parents"--Provided by publisher.

"Hazel, a twelve-year-old aspiring detective, must decode a series of ominous clues tied to a century-old tragedy to find a missing teenager before it is too late."--

"Thirteen-year-old Sophia Tims, with her friend Theo, continues to search for her parents, explorers who have vanished as the borders shift within a world transformed by the Great Disruption of 1799." --

Paired together after a veteran detective retires, Platypus Police Squad members Rick Zengo, a hotshot rookie, and Corey O'Malley, a hard-nosed old-timer, struggle with their differences while tackling their first case involving a missing schoolteacher and a duffle bag filled with illegal fish.