Gnomon

In the world of Gnomon, citizens are constantly observed and democracy has reached a pinnacle of 'transparency.' Every action is seen, every word is recorded, and the System has access to its citizens' thoughts and memories--all in the name of providing the safest society in history.
When suspected dissident Diana Hunter dies in government custody, it marks the first time a citizen has been killed during an interrogation. The System doesn't make mistakes, but something isn't right about the circumstances surrounding Hunter's death. Mielikki Neith, a trusted state inspector and a true believer in the System, is assigned to find out what went wrong. Immersing herself in neural recordings of the interrogation, what she finds isn't Hunter but rather a panorama of characters within Hunter's psyche: a lovelorn financier in Athens who has a mystical experience with a shark; a brilliant alchemist in ancient Carthage confronting the unexpected outcome of her invention; an expat Ethiopian painter in London designing a controversial new video game, and a sociopathic disembodied intelligence from the distant future.
Embedded in the memories of these impossible lives lies a code which Neith must decipher to find out what Hunter is hiding. In the static between these stories, Neith begins to catch glimpses of the real Diana Hunter--and, alarmingly, of herself. The staggering consequences of what she finds will reverberate throughout the world.