The book discussed here is entitled
The Calculus of Happiness: How a Mathematical Approach to Life Adds Up to Health, Wealth, and Love (Princeton University Press, 2017) by
Oscar Fernandez. If the thought of calculus makes you nervous, don't worry, you won't need calculus to enjoy and appreciate this book. Its actually an intriguing way to introduce some of the precalculus topics that will later be needed in a calculus class, through the examination of some of the basic mathematical ideas that can be used to analyze the problems of how to attain relationship bliss, live long, and prosper and all without being a Vulcan.