The Naturalist: Theodore Roosevelt, A Lifetime of Exploration, and the Triumph of American Natural History

Do the Hard Things First: Master Self-Control: Resist Instant Gratification, Build Mental Toughness, and Master the Habits of Self Control (Do the Hard Things First Series)

We Can Do Hard Things: One Boy’s Journey to Finding Courage and Confidence Within

We Can Do Hard Things: Answers to Life's 20 Questions

I Do Hard Things: A Bible Study to Break of Fear and Pain

Do Hard Things (text only) by A. Harris,B. Harris,C. Norris

You Can Do Hard Things: How to Ditch the Excuses & Achieve Your Dreams

Do Hard Things: Why We Get Resilience Wrong and the Surprising Science of Real Toughness

Do the Hard Things First: How to Win Over Procrastination and Master the Habit of Doing Difficult Work (Do the Hard Things First Series)