If you haven't read it already, you might enjoy this:

http://www.amazon.co.uk/Decoding-Reality-Universe-Quantum-In...

The question of whether or not something is 'real' is a slippery one at the scales we're talking about.

A link to the book in question (clean btw, no referral): http://www.amazon.com/Decoding-Reality-Universe-Quantum-Info...