The Prefect by Alastair Reynolds

Another Revelation Space novel this one is set in the fabulous Glitter band of Yellowstone when it is at the height of its power and influence. It is half detective novel and half space opera. Tom Dreyfus is a cop. One of the prefects tasked with keeping the peace in this collection of independent asteroid habitats and in particular with protecting the integrity of the democratic voting system which governs the band. What starts out as a straight forward vote tampering case legend out to have much more serious consequences as a malign super-intelligence makes a bid to takeover the entire Glitter band. Great Sci Fi Entertainment as can be expected from Reynolds.

House of Suns by Alastair Reynolds

This story is set millions of years into the future and mankind has expanded around the galaxy in many expanding and collapsing empires. The only constants are the "lines", clone families who persist through the millennia travelling around the galaxy and possessing almost god like powers (the ability to dam a star for example). An attempt to wipe out one of the lines sparks off an enjoyable romp through big concept sci fi. Generally very good but the ending is weak in my opinion.