Peak oil!?

I've just finished listening to (as opposed to reading) Alex Scarrow's Last light and Afterlight, and I'm scared.
These books are fiction, but I started Last light when the English riots in August were happening (the looting, the arson, the loss of control by the police), were in fact paralleling the book, hence my apprehension & fascination with pilchards in tomato sauce.
The story was recommended to me as another in the post-apocalyptic theme. It takes a relatively common gist, our reliance on oil, but takes the premise up a notch.

I'm not that keen with how some of the deaths come to pass, or a generation-encompassing conspiracy, but the scenarios as the publicity states - is as real as tomorrow, and how long would you last.
Not wishing to ruin the story for others, but essentially it primarily follows the members of the Sutherland family after a massive oil crisis - what happens to them and to the rest of the world at large.
All I know is I'm stocking up the pantry with non-perishables!
Be prepared.