The latest edition of Mac OS X Panther Unleashed is one of several book Mac OS that understands the importance of Darwin and takes time to explain to readers - who, mostly, which is considered not familiar with using Unix but quite competent with the Mac GUI - how to to get the most out of it. The message is clear: Even if you are reluctant to commit to Linux or Free BSD, this book can help you use the Unix-like the one in Mac OS X. There is coverage of graphical applications, as well as Unix-style command line of Darwin, and you can do far worse than relying on John and William Ray for guidance in getting most of the iLife applications. However, the main attraction of this book - the reason it's worth its cover price - is an introduction to Unix as implemented in Mac OS X.