The Horse and His Boy (Chronicles of Narnia, #3) - C.S. Lewis, Pauline Baynes

Smiled at some bits, laughed at others, and loved the mare most of all.

 

I liked the part about being told only your own story and the detail of the torn back. Oh, and the Pevensies' cameo (reading carefully, there are these minuscule hints of Susan being different than the other three too).