This fiction is predominantly an epistolary novel.
Alice, Eileen, Simon & Felix are the four main characters around whom the whole story revolves. Alice is a famous author and Eileen is an editor of a literary magazine. They are best friends from college. Through their long emails, they discuss history, socialism, climate change, consumerism, religion, morality, and many other topics. Though the discussions happen through emails, one doesn’t feel the connection, instead I got the impression that these topics were just sprinkled here and there just for intellectual chit chat.