Spoilers for both part 1 of Bridgerton season 4 and An Offer from a Gentleman by Julia Quinn through chapter 15—we’ll update this story when part two drops. The fourth season of Bridgerton draws from the third book in Julia Quinn’s Bridgerton series, . Here, the 12 differences between this season of Bridgerton and An Offer from a Gentleman, in roughly chronological order:1. The re-ordering of Colin and Penelope’s story—and the Lady Whistledown revealLiam Daniel/Netflix Luke Newton as Colin Bridgerton and Nicola Coughlan as Penelope Bridgerton in Bridgerton season four. Bridgerton House inhabitantsNetflix Violet Bridgerton and Lady Danbury at the Bridgerton masquerade ball.