George Alec Effinger's A Fire in the Sun is the sequel to When Gravity Fails. Marid has now become the right hand man of the major crime boss and has a 'job' with the police force. All his old friends and associates want little to do with him. In addition, his mother comes back into the picture as well as his boss' main rival. His boss keeps giving him odd jobs and showering him with 'gifts' that further isolate him. He gets drawn into a murder investigation that turns into a serial murder spree for organ harvesting. All the various loose ends get connected and tied up in the end.
Effinger crafts a complex crime mystery with Marid taking damage all along the way. Unfortunately, he seems to float above it all with his enemies giving him enough time and space to pick them off one at a time. Overall, it was not as satisfying as the prior offering. Other than some fancy weaponry and the recording of mental states for kinky pleasures, there's not much in the way of sci-fi.