This is a great and delightful introduction to personality psychology for laypeople. If you ever enjoyed a Tedtalk by Brian Little, this short book is for you. Spiked with funny anecdotes and good questions I would say this is a true self-help book, since it encourages you to reflect and describes realistic boundaries of wanting to lead a happy life. It's also doesn't promote toxic positivity, but refraiming in a healthy way to sustainably do, what matters most to you.