The Girl in the Green Raincoat (Laura Lippman)

This slender novella is an interesting mystery with the twist that the protagonist is a detective laid up on total bed rest by a difficult pregnancy. She watches life in the park she can see from her window, and notices a woman in a green raincoat walking her dog every day, until the day the dog shows up trailing its leash, and the woman is gone. What happened to her? I figured out the answer about halfway through, but still enjoyed the story in a mild way. As a novella, it doesn't have the scope to fully develop the characters or the events, and as a late novel in a long series it relies on a lot of back story I didn't have, which left me somewhat unsatisfied. Not bad, though.