Sonja Lyubomirsky is a professor in the Department of Psychology at the University of California, Riverside and author of The How of Happiness, a book of strategies backed by scientific research that can be used to increase happiness. She is often quoted in news articles about positive psychology and happiness. In the book The Only Self-Help Book You'll Ever Need, a criticism of self-help books, Lyubomirsky's The How of Happiness is praised as a self-help book that has claims backed by empirical data. Lyubomirsky is also an associate editor of the Journal of Positive Psychology.