What is the strange appeal of big books? The mega-novel, a genre of erudite tomes with encyclopedic scope, has attracted wildly varied responses, from fanatical devotion to trenchant criticism. Looking at intimidating mega-novel masterpieces from The Making of Americans to 2666, David Letzler explores reader responses to all the seemingly random, irrelevant, pointless, and derailing elements that comprise these mega-novels, elements that he labels "cruft" after the computer science term for junk code. Letzler suggests that these books are useful tools to help us understand the relationship between reading and attention. While mega-novel text is often intricately meaningful or experimental, sometimes it is just excessive and pointless. On the other hand, mega-novels also contain text that, though appearing to be cruft, turns out to be quite important. Letzler posits that this cruft requires readers to develop a sophisticated method of attentional modulation, allowing one to subtly distinguish between text requiring focused attention and text that must be skimmed or even skipped to avoid processing failures. "The Cruft of Fiction" shows how the attentional maturation prompted by reading mega-novels can help manage the information overload that increasingly characterizes contemporary life.