Kiss Me First by Lottie Moggach

Kiss Me First reminds me a bit of Gone Girl by Gillian Flynn, and a bit of The Circle by Dave Eggers. When Tess decides to end her life without hurting friends and family, Leila, our sheltered, unreliable narrator, agrees to assume her online presence and update as though she were still alive. At first she relishes the chance to live this sparkling new life but complications slowly emerge. A smart, inventive thriller by a talented new writer.