The Horse and His Boy

The 6th published book in “The Chronicles of Narnia”, but is the 3rd chronologically.

Shasta, our main character, escapes with the Narnian stallion Bree to avoid being sold as a slave. He shortly encounters another runaway, Aravis and her companion Hwin, a Narnian mare. The four travelers quickly find themselves entangled in plots and schemes of cruel Kings. But they are, and have always been, guided by Alsan himself.