Linked from the Ubuntu Weekly Newsletter I found this nice review of the Official Ubuntu book. A couple of people have posted in response to this blog, about what is going on w/Edgy and will the information in this book help.
For Edgy we are currently working on getting the book updated and it will be included in the example content section of the distribution. I have some more work to do for Kubuntu, like gettings screenshots but then I will upload and we can get that solved. This should fix the bug where the same screenshot shows up in several locations.
There will not be a new book released, jsut the update on the distro release. I hope that solves the questions