Private investigator Tess Monaghan is on bed rest due to her pregnancy. With nothing to do during her long hours sitting on her back porch, she has taken to watching all of the dog walkers in the park. One in particular catches her attention, a girl in a green raincoat walking an Italian Greyhound in a matching green rain coat. They are there every day at the same time, except for the Sunday Tess sees the little dog running through the park in his coat, leash attached, and the girl is nowhere to be found. She enlists the help of friends to try to find out what happened to the woman, getting involved in something that she never expected.
Yes, it is Rear Window basically. Its a nice short read, and there is a bit of a twist at the end, but nothing spectacular. Still, if you are looking for an enjoyable quick read, I would check it out.