Bridgerton fans know that season 5 will focus on either Eloise or Francesca - but what else has been revealed about possible book changes, character exits and more? The Netflix series, which is based on the book series written by Julia Quinn, centers around members of the wealthy Bridgerton family as they search for love in 19th century London. Season 1 centered around Daphne Bridgerton (Phoebe Dynevor) and Simon Basset (Regé-Jean Page), who were the central couple in the first book, The Duke and I.