Rachel Seo When the idea for her upcoming novel “Expiration Dates” began percolating in her head, author Rebecca Serle worried at first that the concept was “gimmicky.” “There was something missing,” she tells Variety over the phone, two weeks before the book’s March 19 launch. The premise — based on the question, “What if a woman got slips of paper that told her how long she’d spend in a relationship?” — felt like it verged on triteness.
