I'm definitely NOT a best seller fan - of any sort - but I did find myself buying a couple of books recently that were recommended (somewhere) and am really thrilled with 'The Time Traveller's Wife'. I can't believe that Existentialism is once again rearing its head! Or perhaps that is a result of 9/11? After all, it was WW1 and WW2 that first fed it.
I also have the Da Vinci Code to read and some of Ian McEwan's books have been pretty enthralling.