The Voyage of the Dawn Treader

Edmund and Lucy Pevensie, stuck for the summer with their disagreeable cousin Eustace Scrubb, are pulled into Narnia through a painting of a ship at sea. They surface in the Eastern Ocean and are hauled aboard the Dawn Treader, where King Caspian is three years into the voyage he swore at his coronation: to sail east and learn the fate of the seven lords his uncle Miraz drove out of Narnia.

The ship carries them from island to island — a slave market, a place where wishes turn dangerous, a lagoon that turns everything it touches to gold, an island of invisible bunglers, a stretch of sea where nightmares come true. Eustace, greedy and complaining, falls asleep on a dragon's hoard and wakes as a dragon himself, and must be painfully undone by Aslan. Beyond the last island lies the very end of the world, and Reepicheep the mouse means to reach it.

The third Narnia book to be published, in 1952, and the most episodic — a sea quest rather than a war, concerned with courage, greed, and what waits at the edge of everything.