Windows 8.1 Preview is available now

Windows 8.1—a free update to Windows 8—is coming later this year, and a prerelease version is available now for you to try. Windows 8.1 has new ways for you to personalize your PC and includes a wave of awesome new apps and services.

Windows 8.1 Preview is available now: http://windows.microsoft.com/en-us/windows-8/preview

Windows 8.1 Preview

First preview: Programming Windows Store Apps with HTML, CSS, and JavaScript, Second Edition

Free eBook: First preview: Programming Windows Store Apps with HTML, CSS, and JavaScript, Second Edition, is available to download: Here

Source: Microsoft Press Blog