In May 2014, a man named Aaran Clark was given six to twelve months to live. He had been writing a single book for years — a letter to his children about everything he wanted them to know. Against time, that one book became six.He survived. The books survived with him. And now, gathered here for the first time as a single unified work, they form what they were always intended to be: one complete transmission, from one life, to the people it was written for.The Book of Yalun · 雅伦 collects all six volumes of the Seeking That Which Was Lost series — The Peaceful Warrior, The Sacred Fire, The Middle Way, The Upright, The Level, and Invisible Threads — in their correct sequence, with a new preface, an exclusive expanded chapter, and a closing that brings the entire arc home.雅伦 (Yǎlún): the cultivation that is passed on. What is built in a person through genuine work, and the relationship through which it reaches the next generation.The finding is yours.