I can't not read a palindrome-titled book by an author I follow.
Apocalypse and distant descendants. Some good fun what-ifs, which is all I need in sci-fi. I could have done with more exciting space travel time, but that's an addiction I have.
The level of scientific goodness was fairly high. The plot moved a bit quickly when narrowing things down towards the end of the "modern" era after dragging the apocalypse out.
If you're a slow reader, wait until you can renew your checkout at the library, this book is hefty. But a fun read.