This book was good company for several weeks. I think one has to be a certain kind of person and/or be in a certain kind of mood for this to appeal. I enjoyed the close analysis of implications of time travel, the idea that there is something out there that wants things to work out and makes corrections towards that goal, and the interesting representation of history. The fantasy that things from history like the library at Alexandria might be saved and brought forward was a ray of sunlight in a dreary day. And the narrator of the audiobook was brilliant at making the various voices distinguishable.