Some books I liked this year:

The Power of Habit: Why We Do What We Do, and How to Change by Charles Duhigg

Maximum Willpower: How to Master the New Science of Self-Control by Kelly McGonigal

The Antidote: Happiness for People Who Can't Stand Positive Thinking by Oliver Burkeman

Poor Economics: A Radical Rethinking of the Way to Fight Global Poverty by Abhijit Banerjee

The New Few: A Very British Oligarchy by Ferdinand Mount

The Great Stagnation: How America Ate All the Low-Hanging Fruit of Modern History, Got Sick, and Will (Eventually) Feel Better by Tyler Cowen

The God Species: How Humans Really Can Save the Planet . . . by Mark Lynas

and

Buddhism: A Very Short Introduction by Damien Keown

I think the titles are self-explanatory . . . if I had to recommend just one book it would be The Power of Habit