"The Tale of Despereaux" is a children's novel by Kate DiCamillo that follows the adventures of a small mouse named Despereaux Tilling. Unlike other mice, Despereaux is brave and curious, and he falls in love with a human princess named Pea. His unique qualities lead him to embark on a quest to save her from danger. The story also features other characters, including Roscuro, a rat who longs for light, and Mig, a servant girl. Their intertwined fates explore themes of love, forgiveness, and the importance of being true to oneself, making it a heartwarming tale for readers of all ages.