I can recommend Lockstep from Karl Schroeder. Scifi books rarely tackle the problem of huge distances, slower thab light speed travel and the resulting long tim

I can recommend Lockstep from Karl Schroeder. Scifi books rarely tackle the problem of huge distances, slower thab light speed travel and the resulting long time scales and their effects on multi-star civilizations (FTL is the usual boring cop-out). Lockstep provides an interesting take on the problem.