Portable Linux Documentation Project for bathroom reading.
This book is pretty much a snapshot of the Linux Documentation Project's documentation. There are some very good chapters in this book, but unfortunately some of them are woefully incomplete, and should not have been included. Understand that all the material in this book is freely available on the net. If you value your printer, and don't mind shelling out some money for a bound tree-ware version, this is a very good book.