Dr. al-Qarni 
You Can Be the Happiest Person in the World [EPUB ebook] 

You Can Be the Happiest Person in the World (do not be sad) is an absolute must-read for all people. It is full of practical advice on how to replace sadness with happiness. The author shines a light on why happiness is so elusive for many of us and shows you where to find your greatest joy. The author wrote this book for anyone who is searching for happiness or who is living through pain and grief or who has been afflicted with a hardship that results in sadness and restless nights.