Inferno (Isaac Asimov's Caliban #2)

When a key politician is murdered, suspicion falls on Caliban...the only robot without guilt or conscience, with no need to obey or respect humanity... a robot without the Three Laws.But the stakes go deeper than one man's life. Caliban is challenging long-held ideas of a robot's place in society. Will he lead his New Law robots in a rebellion that threatens all of humanity?