I love books like this. Simple books that explain complex concepts for ordinary people to understand. I'm a geek, and I'm interested on this stuff. I understand the math behind it, I know most of the physics concepts involved but it's always nice to read a book written by someone that know so much about space and that yet is able to explain it you in the most simple and captivating way.
If you don't know who Neil deGrass Tayson is, well, I don't know what are you doing with your online life. He is an renown astrophysicist how is also an internet sensation -- with his own meme and all! He often apeares on space related documentaries, he presents Cosmos -- a super cool TV Show that everyone should watch -- and he has a science-y talk show where he invites celebrities and where he tries to intersect pop culture with science. It's a really awesome show. And that is -- more or less -- what he does in this book. He explains how the universe was formed, what's is the speed of the light and why is it a barrier, how we know how many years ago dinosaurs stroll the planet, and many many other super interesting things.
It's a small, short book, easy to read. Perfect for an afternoon at the beach. And look at that cover! It's just stunning!