I did not find in this book anything that may justify its price. It is a general book on UNIX that repeats the same things like any of FREE pdf books by GNU project or "UNIX for dummies" that is 6 times less. The book is also full of mistakes, and on some subjects it's plain wrong. To spend this kind of money you can find much better options out there.
After reviewing most of the ecstatic reviews on this book I conclude they are fake.

Well worth the money, explains things very well, the questions are thought provoking and very well done.

I would have given it 5 stars if not for the poor quality of the binding--the book COMPLETELY fell apart. This also happened to several other students in my class--very annoying after I paid $100 for it.

McGrawHill sent me another one after I complained loudly.

this is a great reference book, it explains clearly how to do basic things in unix without confusing the hell out of you. one of the only books i'm keeping after the course was over.

This book is very easy to read and understand. Every section clearly explains the topic and offers plenty of fully explained examples. I find this book an excellent reference for the basics of using the command line, shell scripting, sed and awk. Unlike most textbooks, this will not bore you with heaps of theory--you can use it as a tutorial and to try out the examples as you read. I use linux daily and find almost everything in the book applicable.

After reading the reviews prior to buying this book, I was very skeptical on how awesome this book trully was. After getting the book I have already read 100 pages, and I am here to say that the author starts from the beginning and he works his way to the more indepth advanced depths of UNIX. I would say that this is probably the best book I have read, and I have alot on UNIX and Solaris, and to me this book encapsulates the knowledge needed for someone who is starting out in UNIX right up to a programmer or administrator. I would strongly recommend this book for anyone who has to use UNIX either in college or at a job. This book will help you from basic essentials to advanced knowledge and theory.