UPDATE: I'm deleting this post. Turns out, I (and millions of others, including the editorial staff of USA Today) were the victims of a hoax. Kim Davis did not receive a book deal -- for which I am, honestly, very grateful.
The origin of the story was The National Report, a satire site. To my credit, if the source had been The National Report, I would have realized it -- TNR is sort of a less clever version of The Onion, and I've seen their stuff before. But such is the way of things that bullshit stories sometimes gain unmerited credence by working their way up the media ladder, and this one duped the people at USA Today and other more reputable media outlets -- and thus, yours truly here at Skeptophilia.
All of which reinforces that we all need to check sources carefully. Thanks to the folks who let me know that I'd fallen prey to Poe's Law.
We'll be back to our regularly scheduled (and, with luck, more reliable) programming tomorrow.