A physicist has been executed on Mulholland Drive, his wife terrorized by masked men who apparently wanted the physicist to provide them with cesium. Is a dirty bomb in the works? Bosch tries to solve a murder but the FBI and local Homeland Security officials are investigating it as a terrorist plot. Bosch's motivation for clinging to the case like a bulldog with a bone is insufficiently developed given the apparently threat to public safety, but the twists and political wrangling are more satisfying. Originally serialized in the New York Times Magazine, the book version fills out some of the scenes with more detail. Still, it's a short book (nothing wrong with that) covering an investigation that clocks in at only 12 hours.