One way to protect yourself from Endermen is to build Enderman Proof Shelters. Two simple Enderman Proof Shelters are 1, a 2-block high, at least 2-block wide area (2 blocks wide because an Enderman could reach in with its long arms), and 2, which is just a pool of water, but also needs to be at least 2 blocks wide.
The file type .mobi is an eBook format created by a French eBook company called Mobipocket which created a free software application for multiple devices including PDAs, smartphones and tablet devices.
The .azw3 file format supports a subset of HTML5 and CSS3 features, with some additional nonstandard features; the new data is stored within a container which can also be used to store a Mobi content document, allowing limited backwards compatibility. Older Kindle e-readers use the proprietary format, AZW.