Chuck Palahniuk -- best known as the author of Fight Club -- has just announced that he's publishing his next novel not with a mainstream publisher but through the online subscription service Substack. He joins Sam Leith on this week's Book Club podcast to tell him why; and to talk about how 9/11 changed literature, why he never tires of making his audience feel sick, and how he thinks David Foster Wallace might be alive today if he'd taken some time out to write a few Spider-Man comics.