At the time of this review, the book is roughly 160 pages with 6.11 recipe as the last. Compare to the estimated 500 pages of the print edition and estimated December 2013 publishing date, there should be a ton more to come.
This is the same author as many of the Arduino books, so I was looking forward to some of the arduin-Pi integration recipes. They were not found in the early release, but presumably will be available in the later date as the book gets completed. The early chapters cover the basics, setup, cabling, networking, getting around the Linux interface, basic Python, etc. Personally I am a bit beyond the basics, but always good to have a one-stop book for these things other than having them all over the bookmarks.
As with book of this nature, they introduce the basics to get an aspect of Raspberry Pi up and running, but mileage may vary depending on how far you want to take them. I did learn a new thing or two on file and screen sharing natively on Mac (instead of VNC), and packages that allow easy camera capture server of a Pi.
Overall, I enjoyed this book and can't wait for the rest of the recipes to come out.