Just been to Asda (Pentwyn, Cardiff store) and they have a few books on offer on top of the usual book bargains at £1 and in addition to their 2 for £7 on paperback chart books (which in itself is good).
Not sure if there are any James Patterson fans out there...but they had copies of three of the fairly recent (released last year) James Patterson hardback books ('Cross', 'Step on a Crack' and 'the Quickie') each at £5.
This is a bargain!!!
'Cross' is available at a few Amazon Marketplace sellers at around £4 delivered but aside from that each of these is at least £7 everywhere else.
Not sure if this is nationwide...would welcome comments from people that have been to other stores to confirm.
Not on their website either, so instore only.