In Sanskrit, they say: “Yatha annam tatha manam”. It means: “As is the food, so is the mind”. Your state of mind and your health depends on the type of diet or food you eat. With this theme in mind, I have written this book titled, “A Guidebook on Healthy and Unhealthy Foods and Diets: With Description of Over 80 Foods, Diets and Cuisines in the World”, for the benefit of each conscious citizen of the world, who is able to discriminate between healthy and unhealthy diets and foods. There are 79 chapters in this comprehensive guidebook. I sincerely feel that this guidebook will help all the persons of all the countries and of all the age groups (from one year to over 100 years) who wish to lead a mentally cheerful, physically healthy and joyful long life by taking healthy diets and avoiding unhealthy ones.