Read these titles that Eric Weiner lists in the back of Geography of Bliss
Bhagavad Gita by 
The Poetic Edda by 
An Introduction to the Principles of Morals and Legislation by 
Finding Flow by 
Flow Pb by 
Man's Search for Meaning by 
Lost Horizon by 
Loss of Happiness in Market Democracies by 
Happiness by 
Happiness by 
The Geography of Thought by 
The Conquest of Happiness Bertrand Russell by 
Small Is Beautiful by 
Authentic Happiness by 
The World's Religions by 
Escapism by 
Mark Twain by 
Envy by