Lots of DC comics graphic novels in The Works today (cant see any on their website), majority £2.99 (some £3.99) RRP £9.99+ assume must be nationwide.Many Batman, Superman, Star Wars, Watchmen etc. Those available include:
Batman War Crimes
Batman City of Crime
Batman : Vampire
Batman Chronicles (various volumes)
Batman : Murder at Wayne Manor (interactive mystery hardback - not a graphic novel!)
Robin Year One
Superman Chronicles (various volumes)
The League of Extraordinary Gentlemen
Plus many more!
Also had V for Vendetta for £4.99.
Some good stuff if you are into that sort of thing!