If you are an afs sysadmin you can't afford not to have this incredible book. I'm surprised there are no other rave reviews here.Richard Campbell has done a tremendous job showing the reader what is going on under the hood of an afs system. He also mentions various little titbits you won't find anywhere in Transarc's documentation or webstite. The chapter on debuggin various problems will give you an procedural methodology on how to tackle certain problems. There is an enormous amount of info in this book. It's also worth mentioning that the publisher has done a wonderfull job on design and typesetting; very clean like one would expect from a serious technical book. Anyway what r u waiting for ?; click and buy, this is your new best friend ;)