The Best Undercover Investigations Books for Kids

Summary: Fizz, a small, fluffy police dog, takes on his first case. The winner's tiara has been stolen at the last three show dog championships, so Fizz goes deep undercover as a contestant at the Pemberley Show Dog Trials. With police dog Remi, he has to perform at his best to catch the thief red-handed.

Summary: Frank and Joe Hardy, undercover agents, infiltrate the Deprivation House reality show. With a suspect caught, danger still lurks as mysterious accidents continue. Can they unmask the true threat before it's too late?

Summary: Frank and Joe Hardy face a race against time in New York City. Tasked with solving the murder of Evan Davis, a runaway teen pushed off a subway platform, they must navigate a web of secrets. With potential victims at the Haven shelter and suspects ranging from a fellow resident to Evan's secretive politician father, the brothers must unravel the mystery before more teens fall prey. Can they uncover the truth hidden in the city's shadows, or will the killer strike again?

Summary: Frank and Joe Hardy face a baffling case: drivers crash after seeing ominous signposts that disappear without a trace. As they dig deeper, they uncover a plot involving a stolen experimental motor and a kidnapped racehorse. With danger lurking at every turn, can the young detectives unravel the mystery before it's too late?