This tidbit from the Description:
One thing I forgot to mention in the video: You can easily send books from your computer to the device using the WiFi Transfer app. It’s seriously simple and very fast. You can also just use the Calibre app, though.
Likebook Mars Via Amazon: What?
Video: Likebook Mars Versus Likebook Muses
Likebook Muses: An Upgraded Likebook Mars
Likebook Mimas: Google Books PDF Test
Likebook Mars Firmware Update
Google Books PDF On The Likebook Mars, Part Two
Google Books PDF On The Likebook Mars
Boyue Likebook Mars: An “eInk iPad Mini”
Unplanned Google Books PDF Test: Android Perfect Viewer