We suggest a book that gives all the information that you need to understand the problem in the details. It's called
Sustainable Energy - Without the hot air
Be advised: the author is not skeptical about the potential of renewable energy sources, on the contrary. It is just extremely honest about implications, and he states very clearly what are the choices that we will have to make.
You can get a preview of the content at the author's website:
But we recommend you to get the paperback copy, for a more enjoyable reading: