All 'Game of Thrones' e-books are down to £2 on Amazon (usually around £3-£5 each).
If anyone hasn't read them yet, I thoroughly recommend them, plus a decent saving on the usual price.
Can use Calibre to convert to other e-reader devices.
I recommend purchasing 'A Dance with Dragons' in 2 parts as these are £2 each instead of £12.99 for the complete book.
Hope this helps