Bridgertons #2 - The Viscount Who Loved Me by Julia Quinn

In 1814, after years as one of the most notorious rakes of the Anthony, Viscount Bridgerton decides to settle down and carry on the family line. Haunted by his father's death at a young age from a bee sting, Anthony now believes, albeit irrationally, that he will die young, too and does not want the complication of falling in love.