A synonym for bestseller, popular fiction refers to books that are, well, um, popular with the masses. Popular fiction, as opposed to literary fiction, is typically written for a commercial audience, and it's often written with a specific genre in mind. Steig Larsson's Girl with a Dragon Tattoo is an example of a popular fiction mystery. Check out Shmoop's Bestsellers section for a dose of popular fiction. You know you want to.