Here are the books I finished while on vacation -

The Greatest Show on Earth by Richard Dawkins.

This is a really enjoyable book, and a great resource.  It lays out a very strong case for the theory of evolution, starting with why the complaint that it is "just a theory" is silly, and moving through a variety of the strongest evidence, from historical to genetic.

Crown of Stars by Kate Elliot.

For a number of years, this series has been one of my "airplane" series.  Usually epic fantasy books that are large enough to last me through a flight or two, but also disposable in case I want to toss them while travelling.

This one wraps up this series, but in an almost half hearted way.  All the various plot lines and characters are dealt with, but none of the revelations or twists at the end seemed to add up to much and it felt more like an exercise in wrapping things up rather than an exciting conclusion.