Even being a beautiful e-book, I didn't like the content. Don't provide any useful definitions, just give the reader a VERY basic overview about the area and what products are coming (Oculus, Samsung GearVR, HTC Vive, etc.).
Right reading with some interesting information. Not the most in depth book but enjoyable. I particularly enjoyed learning more on the Oculus Rift as I am not the most familiar with it. I would recommend this book.