The PoweBook and iBook Digital Field Guide from Wiley Publications is the ideal companion for any PowerBook or iBook owner. It is aimed at owners of these notebooks who have not yet researched all of their "secrets," never mind the fact that they have been out of production for more than two years.
The book, written in the long-gone days of 2005, probably could be a little more up to date. Technology does move pretty quickly. However, if you are still chugging away with your iBook or PowerBook, this might be the one for you. Keep in mind that any time it talks of OS X, it will be talking about Mac OS X 10.4 "Tiger." Leopard wasn't even announced when this book was published. On the other hand, I wouldn't recommend that you install Leopard on a G4. Enjoy!
In this book you'll find a lot of helpful information about your Mac notebook, and OS X. You'll learn about function keys, power management, file backup, iChat, VoIP, remote LAN access, and fixing file permissions.
PowerBook and iBook
Part I: Using Your PowerBook or iBook.
Chapter 1: Exploring Your Portable Mac.
Chapter 2: Setting Up Your Portable Mac.
Chapter 3: Security Basics for Your Portable Mac.
Part II: Getting the Most From Your Portable Mac.
Chapter 4: Online on the Road.
Chapter 5: Networking Your Portable Mac.
Chapter 6: Tips and Techniques for a Better Portable Mac Experience.
Chapter 7: Troubleshooting and Maintaining Your Portable Mac.
Appendix A: Upgrading Your Portable Mac.