There are two new books that should be on your summer reading list.
Paul Bogard's new book, The End of Night - Searching for Natural Darkness in an Age of Artificial Light, explores light pollution and its impact on humans and the natural world. The book isn't out until July 9th, but Paul is a great writer and this is an important topic. So, while I haven't read it yet (I will quite soon), I still recommend it without hesitation. Since I haven't read it, you can read a review of it here.
Astronomy 101: From the Sun and Moon to Wormholes and Warp Drive, Key Theories, Discoveries, and Facts about the Universe by Carolyn Collins Petersen. I have worked with Carolyn on several projects - most recently on Losing the Dark a short film/planetarium show about light pollution.
If you are looking for some great vacation reads that will take you into the night and out into the universe, you can't go wrong with The End of Night and Astronomy 101.