By Katherine Ashenburg, and non-fiction (an exception for me!). Found via Stephanie Burgis.
Basically a light, easy to read history about the Western theory and practice of cleanliness over the last 2,500 years or so. Entertaining and even funny to read (though perhaps the humor comes from awkwardness regarding the subject), though I had my doubts as to whether the strength of a few assertions was supported by the source material. (I didn't actually check, of course—that would be work.)
A pretty good light read, and probably shorter than it looks: the margins are fairly generous.