Who’s Killing All My Old Girlfriends? by Jon Spoelstra

Retired columnist Charlie North visits each of his old girlfriends for a story in his blog.
One by one, each old girlfriend is murdered. Charlie quickly became a suspect with cops in LA, Chicago, and Miami.
Charlie investigates, and his blogs go viral, shaking up each investigation.
There’s a rousing finish at a lonely Oregon beach house where everything becomes clear, and justice prevails in strange ways.