Peter F Hamilton's Void trilogy is available for a total of £3.17 in the current Autumn Sale at Amazon UK. (0.99 for the first two, 1.19 for the third, just to be awkward.)
The first one's here:
http://www.amazon.co.uk/gp/product/B003GK219E
I have mixed feelings about Hamilton, myself, and already have a couple of his books unread on my TBR, but what the heck, that's all three for less than the cost of the book I'm currently reading.