Her husband caught hepatitis C when he was eight years old, supposedly from having unprotected blood transfusions. In January 2015 he declared himself cured. 
Gretchen Rubin is a writer on the linked subjects of habits, happiness, and human nature. She’s the author of many books, including the blockbuster New York Times bestsellers Happier at Home, and The Happiness Project. Rubin's books have sold more than a million print and online copies worldwide, in more than thirty languages. On her popular daily blog gretchenrubin.com, she reports on her adventures in pursuit of habits and happiness. She is the author of the most recent New York Times Bestseller Better Than Before: Mastering the Habits of Our Everyday Lives.
Rubin received her undergraduate and law degrees from Yale University, was editor-in-chief of the Yale Law Journal and won the Edgar M. Cullen Prize. She clerked on the U.S. Supreme Court for Justice Sandra Day O'Connor and served as a chief adviser to Federal Communications Commission Chairman Reed Hundt. She has also been a lecturer at the Yale Law School and the Yale School of Management. She lives in New York City. She is the daughter-in-law of former US Treasury Secretary Robert Rubin.
She is author of the best selling The Happiness Project: Or Why I Spent a Year Trying to Sing in the Morning, Clean My Closets, Fight Right, Read Aristotle, and Generally Have More Fun, along with her follow up Happier at Home: Kiss More, Jump More, Abandon a Project, Read Samuel Johnson, and My Other Experiments in the Practice of Everyday Life. Her first book, Power Money Fame Sex: A User’s Guide, parodied self-help books by analyzing and exposing the techniques used to exploit those who strive for those worldly ambitions.
Rubin is also the author and creator of the popular blog The Happiness Project where she writes about her adventures as she test-drives the studies and theories about how to be happier.
Her follow up to The Happiness Project, Happier at Home: Kiss More, Jump More, Abandon a Project, Read Samuel Johnson, and My Other Experiments in the Practice of Everyday Life, came out on September 4, 2012.
Her two biographies, Forty Ways to Look at Winston Churchill and Forty Ways to Look at JFK uses the unconventional "forty ways" structure to explore the complexities of these two great figures and to demonstrate the limits of biography.
- Happier at Home: Kiss More, Jump More, Abandon a Project, Read Samuel Johnson, and My Other Experiments in the Practice of Everyday Life. New York, NY: Harper, 2012. ISBN 978-0307886781
- The Happiness Project: Or Why I Spent a Year Trying to Sing in the Morning, Clean My Closets, Fight Right, Read Aristotle, and Generally Have More Fun. New York, NY: Harper, 2009. ISBN 978-0-06-158325-4
- Profane Waste. Gregory R. Miller & Company, 2006. ISBN 978-0974364834
- Forty Ways to Look at Winston Churchill: A Brief Account of a Long Life. New York: Ballantine Books, 2003. ISBN 978-0-345-45047-0
- Forty Ways to Look at JFK. New York: Ballantine Books, 2005. ISBN 978-0345450494
- Power Money Fame Sex: A User's Guide. Atria, 2005. ISBN 978-0671041298
- Rubin, Gretchen. The Happiness Project. Retrieved September 19, 2014.
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