Tanner Mirabel is a security specialist bent on revenge. In the chase of his prey, his travels take him to the plague-ridden Chasm City where things are no longer as they used to be. As his journey winds down, flashes of memories begin to haunt him.
Chasm City is nothing less than steam-punk sci-fi. That is, while set in a high tech future, Chasm City has reverted to using steam-driven machines and archaic tools to power their various devices. That is a feat, and part of why this is a very readable book. Add to that some very modern and “up-to-date” sci-fi and some delicious twists and turns and you have a very good book.
Chasm City is a pseudo-sequel to Revelation Space and Absolution Gap — set in the same universe but with different main characters.