Reviewing a book in its Fourth Edition is both easy and hard. It’s easy in the sense that, unless the book has completely changed, it is still essentially the same as prior editions. More here

All-in-all, the Fourth Edition is a worthy update to the The Official Ubuntu Book. Still no information on version update options (alas), but I suppose that’s what ubuntuforums.org is for. As I mentioned previously, 512 pages won’t tell you everything there is to know about Ubuntu. It is enough to get you started though, and to take you into some interesting areas other books might not touch on.