Our favourite novels leave a lasting impression, a sense of private awe that glows even after we’ve forgotten the details. In rare cases, we are bold to say, “That book changed my life.” For me, the shortlist would include Anne Tyler’s ‘Saint Maybe’, John Updike’s ‘Rabbit, Run’ and Marilynne Robinson’s ‘Gilead’ — novels that fundamentally altered the way I think about myself. But then there is another collection of novels — some great, some not so great — that appeared in just the right form at just the right moment to effect a measurable impact outside the literary realm. That influence is relatively rare. We are far more likely to be motivated by works of nonfiction, by information, by expos. For a novel to refashion our social, economic or political lives requires a kind of mainstream popularity that few works of fiction attain. And even then, a novel’s theme must be powerful enough and singular enough to push a significant segment of the population in a particular direction. Fiction writers, for the most part, don’t think in such polemical terms. But here are a dozen novels that — for better or worse — changed the way we live.