Romancing Mr. Bridgerton is a captivating regency rivalry romance book written by Julia Quinn. This novel tells the story of Penelope Featherington, a wallflower who has secretly been in love with her best friend's brother, Colin Bridgerton, for years. As Penelope's feelings for Colin deepen, she must navigate the challenges of society's expectations and the secrets that threaten to tear them apart. With its endearing characters, witty banter, and heartfelt romance, Romancing Mr. Bridgerton is a delightful addition to the regency romance genre.