Resolving to earn so much money that his mother will no longer stress out over the bills, eleven-year-old Timmy Failure launches a detective business with a lazy polar bear partner named Total but finds their enterprise "Total Failure, Inc." challenged by a college-bound spy and a four-foot-tall girl whom Timmy refuses to acknowledge.

Newly arrived in 1892 New England, Abigail Rook becomes assistant to R. F. Jackaby, an investigator of the unexplained with the ability to see supernatural beings, and she helps him delve into a case of serial murder which, Jackaby is convinced, is due to a nonhuman creature.

After watching a movie about a detective on the television, Bean decides to set up shop as a private investigator--and she and Ivy start looking for mysteries to solve.

From the publisher. Iris Anderson is only 15, but she's quickly mastering the art of deception in this YA novel for fans of Veronica Mars. It's the fall of 1942 and Iris's world is rapidly changing. Her Pop is back from the war with a missing leg, limiting his ability to do the physically grueling part of his detective work. Iris is dying to help, especially when she discovers that one of Pop's cases involves a boy at her school. Now, instead of sitting...

"With agent Brash trapped in a mysterious coma, the technicians at S.U.I.T. have designed the ultimate replacement: RoboBrash! This high-tech replica has been programmed with all of the original Brash’s crime-fighting skills and knowhow―but it seems he's got a few bugs in his system! Will Mango and his new partner be enough to stop the giant ants that are on a rampage in the city? Orchestrated by the spaced-out villain, Maestronaut, and Houdino,...

With their Very Exciting Spy Technology and their tried-and-true, toilet-based travel techniques, the InvestiGators are undercover and on the case! And on their first mission together, they have not one but two mysteries to solve! Can Mango and Brash uncover the clues, crack their cases, and corral the crooks--or will the criminals wriggle out of their grasp?

World-famous detective Timmy Failure recounts how he began solving mysteries and how he got his famous red scarf.

The InvestiGATORS are the best crime-fighting duo in the world. But not even their hi-tech training programs can prepare them for the return of their greatest nemesis, Crackerdile, in a shocking new form! Even worse, he’s creating a team of super villains! Faced with the choice between saving themselves or catching the crooks, can Mango and Brash make sure the gator good prevails?

Ghosts start haunting Jigsaw's classmates, but there's a new ghostbuster in town stealing all of Jigsaw's clients.

Saxby Smart is no ordinary ten-year-old. He's the best detective in the world, or at least the best one who also happens to be in elementary school. Follow the clues and help solve three of his most head-scratchingly bizarre cases in this first book of the series.