Instead of purchasing e-books through a single online store to read only on compatible software (i.e. books bought from the Kindle Store can only be read on Kindle apps), Google lets consumers buy books either from its store or any other online vendor that sells books in EPUB and PDF formats, and read them on any device with a web browser.
The VG900 is compatible with E-mount lenses, and it's a fine stills shooter (like the A99, it's capable of 14-bit RAW captures), but it's best suited for high-end video production, where it offers 1080p recording at 24 or 60 frames-per-second through a sensor that features 45 times the area of a conventional camcorder.