a) Coalescent: takes place in essentially-present and a thousand years ago (give or take). Excellent novel, neat science fiction y ideas. Hooray.
b) Exultant: takes place thirty thousand years in the future (give or take) and throughout all of the history of the universe. Tons of great ideas and awesome gadgets. Sweet.
c) Transcendent: it is my firm belief that Baxter has an 8 year old kid who wrote this book. Granted, I am not done with it. So I guess I'm only claiming his kid wrote at least half of this book. What has happened, Mr. Baxter, sir, what has happened.