Agatha Oddly (1) The Secret Key [Not-Us], 9780008211837: A great debut mystery adventure for children ages 11+: Book 1

Meet thirteen-year-old Agatha Oddly - a bold, determined heroine, and the star of a stylish new detective series. 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 scholarship to the prestigious St Regis School, a cottage 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…