Murder at Larkfield Barn by Betty Rowlands
Murder at Larkfield Barn is the second of the Melissa Craig mysteries I've read, so while I usually avoid books with serial killers, I knew the type of book it was going to be and wasn't too concerned. Melissa is a mystery writer with a Private Investigator boyfriend, so it's really no wonder she gets mixed up in these mysteries.
The blurb gives you the lay-out. There's a serial killer in the area who paints horrible smiles on the victims. But the police aren't convinced the murder in Upper Benbury was committed by the same person, maybe it's a copycat. It turns out that of course there's more than one killer. And Melissa is always at just the right place at the right time to put all the clues together.
Rowland can be a little heavy-handed in this one. The foreshadowing is annoying rather than suspense-building. It's pretty easy to guess who the killer(s) are, just based on how they're portrayed, but...