August Books 19) Diaspora, by Greg Egan
A book about a posthuman society - most people exist as virtual entities in the datanet of vast supercomputers - dealing with astrophysical disaster striking the earth and then trying to explore parallel universes. Lots of mathematical theory, but rather short on interesting characters or plot resolution; perhaps a bit like Stapledon without his trademark breathlessness. Glad to have finally ticked this off my list.