Related: Big Little Lies: Who's Dead and Whodunnit 1. The Story
In the book, Camille Preaker is an emotionally unstable journalist who has just finished a brief stay in a psychiatric hospital. She gets an assignment to cover a string of murders in her hometown, which ends up triggering a number of events that threaten to change Camille and her town forever. There's no word on how closely the series will follow the novel, but since Flynn is involved in the project, we assume it will do her original story justice.