It's also his most tautly plotted novel because of the detective noir framework. Altered Carbon by Richard Morgan and the earlier Vlad Taltos books by Steven Brust also used detective noir conventions to great effect. It's a writer's crutch, but so many fantasy and science fiction writers suck at plotting and pacing that I'd prefer they lean on crutches occasionally rather than bore their readers to death.

Egan's two most recent books, Incandesence and The Clockwork Rocket, are great if you're a math and physics guy.