"Beginning Ubuntu Linux" by Keir Thomas and pubished by Apress.
"This is the first book of its kind to cover the hottest new Linux distribution, and will teach you how to make the most of your Ubuntu desktop. First, the book introduces you to the world of Linux and the open source community, and then outlines Ubuntu installation and configuration in detail. You’ll learn how to wield control over your newly installed operating system. Then you’ll learn about system customization opportunities and fun tasks like listening to audio CDs and MP3s, viewing movies, performing office and Internet-related tasks, and maintaining your Ubuntu system in general."