The Art of Happiness with the reference of the great Dalai Lama is the best source you can ever get. You will learn a lot from this book.
As per my own experience, I can bet you that if you go through the book with concentration and desire to be happy . At the end of the book, you will get a different personality of yours. You will be happy and compassionate in all the situations which life offers
I'll surely recommend to this book to you if you wish be a Happy person.
Good Luck !