This is truly an excellent method of working to accept and overcome the problems of depression.
I have read some of the classic books on depression and cognitive therapy such as David Burns' "Feeling Good", and this is a much more comprehensive approach, based on the principles of cognitive therapy but with the addition of mindfulness.
This approach is also good for people who aren't really clinically depressed but who get caught up in negative thinking patterns and low self esteem: "Why me?" "I'm a loser", "I'll never get ahead", etc...
The book has a great cd with it to teach you exactly how to practice the mindfulness exercises. I hesitate to use the term meditation because people tend to start thinking things like "I can't meditate", "It's too hard", etc... By the time you read the book, you will understand that meditation is not hard at all, it's just a matter of doing it, and it can be done in as little as 3-5 minutes and still be worthwhile. It's not a matter of "contemplating your navel" but rather just learning to BE in the present moment, to watch one's thoughts arise and fall away, to slow down, to look at what is happening in one's body and in one's mind. Nothing at all difficult about it. You can do it. And you will find it worthwhile if you do it for a few weeks.
I highly recommend this book to people suffering from depression.
Another very good book for certain types of depression and anxiety that I highly recommend is "Emotional Blackmail" by Susan Forward, which helped me a great deal.
One more book I will recommend not so much specifically for depression but because it teaches the value and technique of "mindfulness", is Jon Kabat-Zinn's "Wherever You Go, There You Are".
The last thing I will say is that just reading any of these books is not enough! You MUST do the exercises and put mindfulness into practice! You will be glad you did!