A surprisingly small book, considering the size of some of Asimov's others. Asimov introduces Elijah Bailey, a cop who must solve the murder of an off-planet visitor, although the real story here is society's acceptance of robots (or its lack thereof) and the advancement of humanity.

Asimov's character relationships come off lackluster as usual, but they're easily overshadowed by the intriguing and feasible he paints.