This is a really good book to help someone dealing with depression..
Personally I think its beneficial to more than people suffering from mental health problems. A lot of the things he shares to help someone dealing with depression could be used to enriched the life of someone not dealing with it.
The Upward Spiral: Using Neuroscience to Reverse the Course of Depression, One Small Change at a Time - Kindle edition by Alex Korb, Daniel J. Siegel. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading The Upward Spiral: Using Neuroscience to Reverse the Course of Depression, One Small Change at a Time.