Kindle bookstore: Is it really the cheapest option?
The newly launched Kindle bookstore claims to offer the best value of any e-bookstore
Mark King , guardian.co.uk, Thursday 5 August 2010 15.32 BST 

Kindle: Do its prices set the book world on fire?

Not to be outdone by Apple's iPad, Amazon today launched the UK Kindle bookstore from which books for its own e-reader, recently reduced in price, can be bought. It claims to offer more than 400,000 books at the lowest prices of any e-bookstore in the UK.
We tested this claim against Apple's iBooks store, two online bookstores – Amazon and Play – and high street retailer Waterstones.

Link here to read The Guardian's survey  prices.