The 13th Chapter (A Mahoney Green Mystery) (Hippo Graded Readers)

Where is Professor Montague Green?

Mahoney Green knows that something is wrong. With the help of a coded postcard, her best friend and her grandmother, she must find her father before it's too late.

If Mahoney can break the code, defeat the mysterious treasure hunters and track down the missing chapter of a secret and ancient book, maybe she will solve the mystery of The Thirteenth Chapter and see her father again. One thing is for sure, it will be an adventure that she, and you, will never forget.

The Thirteenth Chapter is the first in an exciting new series of mystery books starring Mahoney Green.


The Thirteenth Chapter is published by Hippo Books, a publisher dedicated to producing interesting, readable and fun books. This book is suitable for English students with intermediate English or higher. Be sure to check out our other Hippo Graded Readers.

About the Author:

Patrick Kennedy is the editor of the Hippo Books Graded Readers and Hippo Originals. He is also one of Hippo's principal writers. He is a Delta qualified English teacher with well over ten years' experience teaching in Europe and Asia. Although relatively new to the world of fiction, he has written many English text books for high school and general English classes. He is the author of the Mahoney Green books and has contributed to many of Hippo's short story collections. To find out more about the author, click his name under the book title above.