"Unbreakable Mind" is a self-help book by Tenpu Nakamura that explores ways to cultivate mental strength. - Title: Unbreakable Mind - Author: Tenpu Nakamura Thank you for viewing. There is some aging and wear. Thank you for your understanding. Please refrain from purchasing if you are concerned about minor imperfections, as this item has been stored at home. Returns, refunds, and exchanges are not accepted.