This book is aimed at the person who has learned his way around Linux at the user level and now wants to look under the covers. It's extremely comprehensive - from how to add a Linux application that wasn't in your your initial distribution - whether you can use the binary or need to rebuild it from source - through basic facts on the kernel, devices and their drivers, processes and debugging tools. There has been a need for a book that addresses readers who do know something about computers, but not much Linux. This book fills that need extremely well.