The Duke and I is a captivating regency rivalry romance book written by Julia Quinn. Set in the glamorous world of the British aristocracy, this novel follows the story of Daphne Bridgerton and Simon Basset, the Duke of Hastings. As they navigate the complex social dynamics of high society, their initial rivalry slowly transforms into a passionate romance. With its witty dialogue, engaging characters, and enchanting love story, The Duke and I is a must-read for fans of regency romance.