I highly recommend "Understanding Depression and Finding Hope." I have told many people about it and including this order, I have purchased 6. The authors wrote from personal as well as professional experience.
It is an excellent book for those with depression or to understand the actions of a loved one or friend.
The book covers depression exceptionally well. It helps one to understand depression and to overcome wrong ideas about depression that one might have as a Christian. It also helps those suffering from depression to understand what is happening to them and why as well as being able to get the help needed. It is written in such a way that any lay person can understand.
As a healthcare professional, I've read many books on depression. I appreciate the authors helping people understand depression is a medical condition, just as is high blood pressure or diabetes. It will probably become my "go to" recommendation for my patients w/ depression. Though it is a book about depression, the insights can be easily extrapolated to many difficulties in life.