Naima Coster's latest novel, What’s Mine and Yours, was an instant New York Times bestseller, not to mention both a Read with Jenna and Book of the Month Club pick. Naima talks with Zibby about the ways in which her intergenerational trauma has led her to write more optimistic familial dynamics, how it took her two years of deferring medical school to admit she wanted to be a writer, and why her self-doubt is essential to her writing process.