I just finished "Now: The Physics of Time" by Robert Muller. I have mixed feelings about the book, especially the chapters devoted to the author's interpretation of philosophy. I did enjoy hearing a history/overview of modern physics from someone in the field though, and it was a very approachable book. He was very clear about the open questions in quantum mechanics instead of hand-waving them away, which I appreciated.

I'm sure other books like Stephen Hawking's "A Brief history of Time" would be a good starting place too, but I can't speak to that one personally yet.