Jones, Lena

"Thirteen-year-old Agatha Oddlow's set to become the youngest member of the Gatekeepers' Guild, but before that, she's got a mystery to solve. There's been a murder at the British Museum and, although the police are investigating, Agatha suspects that they're missing a wider plot going on below London - a plot involving a disused Tube station, a huge fireworks display and five thousand tons of gold bullion"--Provided by publisher.

"Agatha Oddlow has been a detective for as long as she can remember -- she's just been waiting for her first big case. And nothing gets bigger than saving the City of London from some strange goings-on. With a home in the middle of Hyde Park, a room full of beloved sleuthing novels, and a secret key that gives her access to a whole hidden side of London, Agatha is perfectly poised to solve the mystery of what's going on. But just who can she trust when no one is quite who they seem"--Provided by publisher.

"An assistant at the National Gallery has gone missing, but when Agatha Oddlow begins investigating, she uncovers a plot bigger than she could ever have imagined"--OCLC.