Although Evelyn Nesbit, the early twentieth century beauty and mistress of the architect Stanford White, is not a character in Kate Atkinson's quirky novel, a painting based on Gertrude Kasebier's well-known photograph is featured prominently on the books cover.
The central circular shape and it's shadow form a rather obvious visual pun on the books title.
KB

Jacket artwork by Sarah Perkins. Original photo of Evelyn Nesbit by Kasebier.