The Wingfeather Saga-The Warden and the Wolf King #4 by Andrew Peterson*

My ten year old read this book to himself.  My boys have loved this series.
This 519 page book contains adventure and the deep development of the characters.  Although the ending is a bit sad, the reader closes the book with the hope and satisfaction.
My son said, "This book was exciting and  a little harsh."
*Highly recommend.
We own this book (we own the entire series).