However, this version is inferior to the "10th anniversary edition" you can download for free from: http://www.lemis.com/grog/Documentation/CFBSD/ It's been edited a bit, and had it's formatting changed since it was published in tree form. Not that O'Reilly needs to be told about the importance of FreeBSD, but every sale is a gentle reminder of the colossal achievement that is BSD in general.The Complete FreeBSDThis book is an in-depth and excellent source of information on the installation, configuration, and administration of FreeBSD UNIX. If you have, or are interested in FreeBSD PC-BSD [...], I strongly recommend you buy this book.Excellent book on FreeBSD, maybe the only one you'll needThis is a very good book on FreeBSD. Just by reading this book you can tell the author Greg Lehey is a smart, seasoned, no-nonsense person that is very familiar with FreeBSD. Since the book covers so many aspects, some are not quite as detailed as others, but he always details the most important aspects, and again explains why. I am very happy with it, 5 stars worth, and I would recommend it to any one interested in learning more about FreeBSD.A Must Have, But Could Be BetterThe two books that I use most frequently when administering my FreeBSD server, are this one by Lehey and UNIX System Administration Handbook by Nemeth et al. My chief complaint with the book (and hence only 4 stars), is that Lehey seems to be a bit conflicted as to whether he wants his book to be a tutorial or a reference book. Lehey does excel in giving a more thorough overview of most other aspects of FreeBSD that do not change quite as quickly. My advice, if you are just trying out FreeBSD, you can probably get by with the free "FreeBSD Handbook" online.