Metro Girl by Janet Evanovich
Apparently I was in the mood for something that didn't require any thought on my part. Or on the author's part, actually. (That was kind of mean. I'm sure the plot required some fitting together and maybe even a little bit of research. Maybe not, though.) It was a nice rest for my brain, kind of like watching TV. I don't think I'll be reading any more like this, though I like to say "Janet Evanovich."