Using and Administering Linux: Volume 1
From looking at the TOCs of all three volumes of this, this book won't teach much that the average linux user doesn't know, and the whole series is unlikely to teach anything unfamiliar to me. It might be nice if you know nothing about Linux and want a structured way to get started.
Chapter 1: Introduction
Chapter 2: Introduction to Operating Systems
Chapter 3: The Linux Philosophy for SysAdmins
Chapter 4: Preparation
Chapter 5: Installing Linux
Chapter 6: Using the Xfce Desktop
Chapter 7: Using the Linux Command Line
Chapter 8: Core Utilities
Chapter 9: Data Streams
Chapter 10: Text Editors
Chapter 11: Working As Root
Chapter 12: Installing and Updating Software
Chapter 14: Terminal Emulator Mania
Chapter 15: Advanced Shell Topics
Chapter 16: Linux Boot and Startup
Chapter 17: Shell Configuration
Chapter 18: Files, Directories, and Links
Chapter 19: Filesystems