Train Your Mind With These Powerful Books If you're going through tough times, feeling stuck, or just want to level up your inner strength these books can shift your mindset and sharpen your mental toughness. 1. 13 Things Mentally Strong People Don’t Do – Amy Morin This book is a guide for letting go of habits that secretly weaken you, like self-pity, fear of change, and people-pleasing. Amy Morin, a psychotherapist, shares practical tools to help you take control of your emotions, stay grounded