This illustration is from The Horse And His Boy, chronologically the third book in the Chronicles of Narnia by C.S. Lewis. It takes place during the reign of Kings Peter and Edmund and Queens Susan and Lucy. Though they appear briefly in the book, the story is not actually about them but rather about a young boy named Shasta, a girl named Aravis, and two talking horses from Narnia, Bree and Hwin. The uncomfortable fellow in the illustration to the left is Rabadash, the crown prince of Calormen who wants to force Queen Susan to marry him. He attacks Narnia's neighbour and ally, Archenland, planning to seize the country then launch a raid from there into Narnia to kidnap Susan. Unfortunately for Rabadash's "romantic" endeavors, Archenland- with help from Narnia- fends off the Calormene invaders. To add to his humiliation, during the battle Rabadash's chain mail gets caught on a hook on a wall, pulling him off his horse and leaving him hanging helplessly until, his army defeated, he is taken into custody by King Lune of Archenland.