"This is a funny, poignant, timetraveling, somewhat cautionary love story told over one very chameleon like lifetime. "Q' stands for Quentina Elizabeth Deveril, the passion of the protagonist's life (we never learn his name), his intended wife until he gets a visit from "a friend" who convinces him to leave her. This is only the first of several visits that cause him to dramatically change his life over and over again. I would argue that "Q" could possibly stand for "quantum physics" given that time travel plays a very big role in this story. But no matter the names or the nameless, this is a fascinating tale with numerous twists and turns that will keep you captivated from the first paragraph until the very last, and very gratifying, line."