| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Communication Skills: A Practical Guide to Improving Your Social Intelligence, Presentation, Persuasion and Public Speaking | 978-1-5150-3191-8 (1-5150-3191-8) | 2015 |
| Emotional Intelligence: A Practical Guide to Making Friends with Your Emotions and Raising Your EQ | 978-1-5086-4591-7 (1-5086-4591-4) | 2015 |
| Self-Discipline: Mental Toughness Mindset: Increase Your Grit and Focus to Become a Highly Productive (and Peaceful!) Person | 978-1-5470-0062-3 (1-5470-0062-7) | 2017 |