Android 4.4 User Guide
There are enough new features and nuances related to Android KitKat version that it warrants a new user guide published by Google.
The Android 4.4 User Guide is a PDF document, so it is easily downloaded and opened on most computers, tablets, and phones.
Click here —> Android 4.4 KitKat User Guide to open the PDF file. Then click on File, then Save As to save the document to your local device.