Ubuntu 8.10 Linux Bible
William von Hagen
Without a doubt the most comprehensive and useful book on Linux I have seen. The printing is a little light and small. But to get the amount of information that's in there in a book that you are able to pick up the small is necessary, but it could be a little darker. It is not "Ubuntu 8.10 for Dummies" but if you have a problem or question, the answer is probably in there.