Nonfiction writers, pay yourself that advance!
Nonfiction writers have a unique opportunity to monetize their books, beyond simply selling the end product.
Joel Friedlander points out that if your nonfiction book progresses in a linear fashion — as in, if the first few chapters set the reader up with the skills to accomplish more complex tasks later — you could consider offering it as a training course.
Friedlander, an author and book designer, explains how to set this in motion in a column at Publishers Weekly.