WordPress 4.4 is scheduled for release in December 2015 and the WordPress 4.4 field guide is available and covers all of the major features in WordPress 4.4. The guide explains what the features are and more specifically, links to posts that explain how they work. While it doesn’t cover every single change, it gives developers and site maintainers an opportunity to learn and understand the major features before WordPress 4.4 relese.
Kindly check this to view and subscribe the Field Guide in WordPress 4.4.
