The Sons of Heaven by Kage Baker

Goodness, the final novel in the Company stories. It's an epic conclusion, perhaps somewhat rushed as Baker ties up all the loose ends from the series. There's also an element of deus ex machina at the very end. That's not to say it's annoying - in fact the over the top elements there are in many ways sidelines to what's actually happening, rather than a way to avoid concluding it properly (it might be that it was required to prevent the book being twice as long).

The ending is a good one, too. She answers or addresses all the interesting questions about immortality, time travel, and so forth that she has brought up through the series. Satisfactory!

Now I just have to read the first one...