if you know anyone who still thinks they can get rich by publishing a book, you should urge them to go check out this AV Club interview with Neal Pollack about all the books he's sold in his career. Turns out, "Ten thousand copies [of each title] appears to be my threshold." Pollack doesn't talk that much about his last traditionally published book, Stretch. (In fact, the only mention of it refers to it as Stretched.) Maybe that's because Stretch was such a bad book that it could get you drummed out of traditional publishing forever. But otherwise, it's an interesting portrait of someone who has failed in many different ways and is now trying to be honest about his capabilities. And it should scare off all those folks who think that the book-and-movie-deal they're carrying around in their head is going to set them up for retirement.