This wonderful eBook is written by Kraig. He provides comprehensive coverage of the platform for Windows Store apps, and devoted chapters on live tiles, notifications, background tasks, background transfers, networking, devices, printing, WinRT components, accessibility, localization, and the Windows Store itself. The final eBook contains 17 chapters. And of course all of the earlier chapters have also been reviewed and refined—over 800 pages in total, along with new and updated companion content!
So you can download the eBook in PDF format here: http://go.microsoft.com/FWLink/?Linkid=270056 (17.9 MB)
EPUB format is here: http://go.microsoft.com/FWLink/?Linkid=272592 (37.3 MB)
MOBI format is here: http://go.microsoft.com/FWLink/?Linkid=272591 (69.5 MB)
The eBook's companion content is here: http://go.microsoft.com/FWLink/?Linkid=270057 (59.9 MB)
Just make use of it and develop new Windows 8 apps. Happy programming!!