I just finished reading Last Light, by Alex Scarrow and I highly recommend it if you haven’t header of of it before. If you are into fiction centered around post-apocalyptic Britain (think Children of Men, or 28 Days Later), or you are even mildly interested about Peak Oil topics, you will surely enjoy this book as well.
I would have personally enjoyed the book more if it were more oriented toward realism than it currently is. I think the author accelerates a bit too much the serie of events describing the overall degradation of human behavior amidst the catastrophe for the sake of making the story more palatable, more ‘action movie’. Also, I’d have preferred a plausible sociopolitical scenario to trigger the book events, rather than the usual “Bunch Of Evil Guys That Rule The World Without Anybody Knowing”™ plot, which deprives an otherwise well orchestrated plot of some credibility.
Still, opens the mind to a lot of thinking about the current energy situation and definitely encourages the reader to learn more about the topic.
Finally, if you are into Peak Oil & related discussions, my personal recommendation for you to learn more is The Oil Drum . A bit too much for insiders of the oil industry in some occasions, but a very good source of articles anyway. (the book author suggests a website too, but his suggestion seems to point to a dead domain nowadays).
Go grab it.
The name is Riccardo Govoni. I’m a Software Engineer working in Google London. I have a passion for data visualizations, data mining, theoretical physics, xkcd, having lots of vi (or emacs, depending on the mood) buffers on screen and coding in general. Learn more 
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Ok, added to my list of books to read. Are you in GoodReads Riccardo? If so, my user is http://www.goodreads.com/user/show/4982111-j-pablo
I see there's a second part, After Light, are you going to read it?
I don't think I'm going to read Last Light. It seems set a bit too far ahead in the future (waterworld-like) to appeal me. If I'm to remain on the 'energy crisis' topic, it's more likely I'll shift toward the realistic end of the scale.