Knowing what's in these books now, I recommend reading them in the following order, starting with the area of interest that you're passionate about. Books are listing in descending order of how much I enjoyed them, how relevant and important they are and how easy to understand and use they are.
On changing behavior 1.Influencer: The Power to Change Anything 2.Mindless Eating: Why We Eat More Than We Think 3.Switch: How to Change Things When Change Is Hard 4.Changing for Good 5.Social Learning Theory 6.Virus of the Mind: The New Science of the Meme 7.Made to Stick: Why Some Ideas Survive and Others Die 8.Drive: The Surprising Truth About What Motivates Us 9.The Tipping Point 10.Nudge: Improving Decisions About Health, Wealth, and Happiness 11.Self-Efficacy: The Exercise of Control 12.Crucial Confrontations 13.Crucial Conversations: Tools for Talking When Stakes are High
On understanding people better and why and how they behave 1.Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives 2.Microtrends: The Small Forces Behind Tomorrow's Big Changes 3.Why We Buy: The Science Of Shopping 4.Call of the Mall: The Geography of Shopping 5.How We Decide 6.Predictably Irrational: The Hidden Forces That Shape Our Decisions 7.Why We Make Mistakes 8.On Being Certain: Believing You Are Right Even When You're Not 9.Sway: The Irresistible Pull of Irrational Behavior
On what healthy living really is 1.The Omnivore's Dilemma: A Natural History of Four Meals 2.Spark: The Revolutionary New Science of Exercise and the Brain 3.The New Optimum Nutrition Bible 4.The China Study: The Most Comprehensive Study of Nutrition Ever Conducted and the Startling Implications for Diet, Weight Loss and Long-term Health 5.Eating Animals 6.In Defense of Food: An Eater's Manifesto 7.Food Rules: An Eater's Manual 8.The Omnivore's Dilemma for Kids
On how we need to fix the sick care system (or why CDHPs make sense) 1.Redefining Health Care: Creating Value-Based Competition on Results 2.Free for All?: Lessons from the RAND Health Insurance Experiment 3.How Doctors Think
On building and measuring an effective wellness strategy 1.Blue Ocean Strategy: How to Create Uncontested Market Space and Make Competition Irrelevant 2.The Balanced Scorecard: Translating Strategy into Action 3.The Ultimate Question: Driving Good Profits and True Growth 4.The New Wellness Revolution: How to Make a Fortune in the Next Trillion Dollar Industry 5.Low-Cost Approaches to Promote Physical and Mental Health: Theory, Research, and Practice
On changing behavior
1.Influencer: The Power to Change Anything
2.Mindless Eating: Why We Eat More Than We Think
3.Switch: How to Change Things When Change Is Hard
4.Changing for Good
5.Social Learning Theory
6.Virus of the Mind: The New Science of the Meme
7.Made to Stick: Why Some Ideas Survive and Others Die
8.Drive: The Surprising Truth About What Motivates Us
9.The Tipping Point
10.Nudge: Improving Decisions About Health, Wealth, and Happiness
11.Self-Efficacy: The Exercise of Control
12.Crucial Confrontations
13.Crucial Conversations: Tools for Talking When Stakes are High
On understanding people better and why and how they behave
1.Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives
2.Microtrends: The Small Forces Behind Tomorrow's Big Changes
3.Why We Buy: The Science Of Shopping
4.Call of the Mall: The Geography of Shopping
5.How We Decide
6.Predictably Irrational: The Hidden Forces That Shape Our Decisions
7.Why We Make Mistakes
8.On Being Certain: Believing You Are Right Even When You're Not
9.Sway: The Irresistible Pull of Irrational Behavior
On what healthy living really is
1.The Omnivore's Dilemma: A Natural History of Four Meals
2.Spark: The Revolutionary New Science of Exercise and the Brain
3.The New Optimum Nutrition Bible
4.The China Study: The Most Comprehensive Study of Nutrition Ever Conducted and the Startling Implications for Diet, Weight Loss and Long-term Health
5.Eating Animals
6.In Defense of Food: An Eater's Manifesto
7.Food Rules: An Eater's Manual
8.The Omnivore's Dilemma for Kids
On how we need to fix the sick care system (or why CDHPs make sense)
1.Redefining Health Care: Creating Value-Based Competition on Results
2.Free for All?: Lessons from the RAND Health Insurance Experiment
3.How Doctors Think
On building and measuring an effective wellness strategy
1.Blue Ocean Strategy: How to Create Uncontested Market Space and Make Competition Irrelevant
2.The Balanced Scorecard: Translating Strategy into Action
3.The Ultimate Question: Driving Good Profits and True Growth
4.The New Wellness Revolution: How to Make a Fortune in the Next Trillion Dollar Industry
5.Low-Cost Approaches to Promote Physical and Mental Health: Theory, Research, and Practice