PUBLISHER: Gallery Books THE INSTANT NEW YORK TIMES BESTSELLER!Starred reviews from Kirkus Reviews * Publishers Weekly * Library JournalNamed a “Must-Read” by TODAY, Us Weekly, Bustle, BuzzFeed, Goodreads, Entertainment Weekly, Publishers Weekly, Southern Living, Book Riot, Woman’s Day, The Toronto Star, and more!For two sworn enemies, anything can happen during the Hawaiian trip of a lifetime—maybe even...