Volume 2 has been updated. For the most part this is a vast increase to the GUI widgets chapter as well as various corrections (there are now more than 1000 pages). You'll find more details on the Digital Skills website (www.digital-skills.co.uk).
Anyone who has bought the book in the last two months (November and December) will automatically receive an email over the next few days detailing how to download the new version. If you bought the book directly from Digital Skills before November, the website explains how to receive your free copy.