Hi Anurag,
Taking JasonB's idea re comparisons one step further, if you want to have a look at how someone in the p-book world handles it, have a look at The Book Depository (
http://www.thebookdepository.co.uk). When I'm buying p-books (which isn't so often any more), this is the place I normally go.
The Book Depository links to the Amazon UK site from each title record, and put live price comparisons from Amzon onto their records. Their theory is that they're not necessarily in competition with Amazon, but rather that their services are complementary.
If you want to see how someone in the p-book world does it well, I think that you can't do much better than to have a look at their example.
Cheers
: )