The Novel Cure From Abandonment to Zestlessness: 751 Books to Cure What Ails You Ella Berthoud, Susan Elderkin
This was great fun to read, and I also liked the alphabetical order of the book. It makes it easy to search for your trouble quickly, or you can just read the book from the beginning and 'mix and match'. Easy to read, The Novel Cure is full of suggestions and describes why the chosen books suit the disorders or problems.
I recommend this, and I'll certainly be buying it!