The Silver Chair by C.S. Lewis

The Silver Chair by C.S. Lewis is one of my most favorite of the Chronicles of Narnia. In this story, Jill Pole and Eustace Scrubb are brought to Narnia by Aslan to help track down the lost prince, Prince Rilian who has been kidnapped by... Well, I shouldn't say, because that's a bit of a spoiler.
The kids have the help of a kind but pessimistic marshwiggle named Puddleglum, and start on their journey north to where they believe the lost prince was taken.

What happens next? Read the book and find out!

I recommend this book to young and old who enjoy clean fantasy with Christian alegory.