Redemption Ark

Once again, Alastair Reynolds cranks out a weighty tome in Redemption Ark (Part of the Revelation Space universe) that proves, at least to me, hard SciFi can be surprisingly entertaining. Part of the problem with sticking directly to physics, as Alastair with his Ph.D. in Astronomy is likely to do, is that space travel is necessarily limited to current breakthroughs in physics, even when targeted hundreds or thousands of years in the future.