Here is an audio recording of Pullitzer Prize Winning Author, Geraldine Brooks.
From Amazon: "In Caleb's Crossing, Brooks offers a compelling answer to the riddle of how--in an era that considered him an intellectually impaired savage--he left the island to compete with the sons of the Puritanical elite. She relates his story through the impassioned voice of the daughter of the island's Calvinist minister, a brilliant young woman who aches for the education her father wastes on her dull brother. Bethia Mayfield meets Caleb at twelve, and their mutual affinity for nature and knowledge evolves into a clandestine, lifelong bond. Bethia's father soon realizes Caleb's genius for letters and prepares him for study at Harvard, while Bethia travels to Cambridge under much less auspicious circumstances."