After reviewing few Lunix book, This book is the best one in its class from a very limited choice in the linux domain.
Sobell wrote this one for novice to intermediate level. Advanced user will find some chapters useful. The topic coveres a wide range of HOW TO USE LINUX. If you are new to Unix or Linux and want to get start quickly, this book is a right one for you. It gentle introduces and guides you to Linux usage. It covers in detail many issues, commands, usages or Shell programming.
This book, like most books from Allison Wesley, use the high quality paper. Much higher quality than books that cost up to $100.00. The paper simply feels good in the hand.
So, what you can expect from this book? It show you how to use Linux, program bash/zsh, use popular utility commands, admin the system, and some introductions to programming in C and debugger tools.
In summary, a high quality Linux book with high quality paper. I gives it 5* for the clear writing from Sobell. And I have read many many Unix books in the last 10 years.