Among all other seemingly promising self-help books, Dr. Burn's book is perhaps the best book on overcoming depression. It has covered in details on different kinds of depression as well as effective and immediate ways to combat the disease affecting 20% of the population. It's a long book, so it may be difficult to read if under depression. Trust me, once you finish it, you will thank yourself for forwarding the very first step of self-love and self-help.