What makes a man? In this terrific debut novel, A Working Theory of Love, emotionally adrift divorcé Neill Bassett Jr. is trying to build the world's first sentient computer program. After inputting 20 years of his late father's diaries, he holds conversations with a pixelated personality that seems just like his dad discussing his life, his childhood, and his current romantic woes. Throughout, Hutchins hits that sweet spot where humor and melancholy comfortably coexist. A-

