Book Details

Harper Collins Logo

Agatha Oddly

The Secret Key (Agatha Oddly, Book 1)

About the Book

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…

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…

Educator and Librarian Resources

Product Details

  • ISBN: 9780008211837
  • ISBN 10: 0008211833
  • Imprint: HarperCollinsChildren’sBooks
  • On Sale: 09/18/2018
  • Pages: 320
  • List Price: 12.99 CAD
  • BISAC1: JUVENILE FICTION / Mysteries & Detective Stories
  • BISAC2: JUVENILE FICTION / Girls & Women

The Secret Key (Agatha Oddly, Book 1) by Lena Jones

The broadest selection of online bookstores. The links will take you to the web site's home page.

Other Booksellers

The broadest selection of online bookstores. The links will take you to the Web site's home page.


International Customers

If you are located outside Canada, the best way to order online is to choose from the following bookstores listed by region and country.

HarperCollins Reader

We created the HC Reader App to be a simple way to read our e-books. Our App is available for download on iOS and Android devices.

We strongly encourage using the HarperCollins reader application since it supports the type of file we are using. You may experience some technical difficulties using a different reader application.


  1. You need a HarperCollins Account. If you purchase/have purchased an e-book from HarperCollins, this is your account login and password. If not, please click here to register.
  2. Download the HC Reader App on iOS or Android. Enter your HarperCollins account username and password. Please note that your username is an e-mail address.
  3. Download your e-book and enjoy!