The strangeness that is our universe

Over the weekend I've been gobbling up Brian Greene's The Fabric of the Cosmos. I still don't understand strings, branes, and how the known universe might be a projected hologram, but this book gets me further than any of the other popular science treatments I know. The author favors string theory and the idea of extra, hidden dimensions. He also discusses how we are on the verge of testing some of these exotic ideas. Recommended, especially if you find these ideas intriguing but have a hard time grasping them in intuitive terms.