Back in 97, I felt this was the book to have regarding getting yourself aquainted with a fledgling OS. 11 years later, Sobell is writing the same book based on distributions. While the information in this book is terribly dated by now, it was still instramental to my learning and enjoying a familiar yet new way of computing.
A alphabetized listing on linux programs, commands, and processes. A very useful tool for building knowledge which supplements and expands on command line manuals rather than taking their place. Overall, a very good reference, and the organization provides for a logical grouping of commands, tasks, and technologies that might not be immediately obvious from a bash prompt.