Books from Penguin, Macmillan, HarperCollins and Hachette UK will appear from today in the UK iBookstore for the international release of the iPad. These publishers agreed eleventh-hour deals with Apple, but as yet, there is no word on an agreement with Simon & Schuster who already have ebooks available in the US iBookstore.
Up until yesterday, there were few purchase ebooks available in the UK iBookstore.

