Edward M. Lerner

History buffs expect historical background in historical fiction. Mystery readers expect forensics and police procedure in crime fiction. Westerns - gasp - describe the West. Techno-thriller readers expect to learn something about technology from their fiction.

Every time you log in to Facebook, every time you click on your News Feed, every time you Like a photo, every time you send anything via Messenger, you add another data point to the galaxy they already have regarding you and your behavior.