Books like Colleen Hoover’s 2016 novel ‘It Ends With Us’ are blowing up with BookTok influencers—and seeing huge sales spikes that often send titles to the top of the bestseller lists. ‘It Ends with Us’ has become what Atria’s senior associate director of publicity, Ariele Fredman, called “the book of the summer”—despite the fact that it was published five summers ago.
