This book tells about the nine leading intellectuals of Joseon, including Ho Kyun, Lee Ik, Yang Eun Soo, Ahn Jong Bok, Hong Dae Young, Park Ji Won, Lee Deok Moo, Hong Seok Joo and Hong Gil-yu, author borrows from Professor Jung Min, a humanities scholar who has written over 40 books, and shares a key reading strategy that changes your life, every writer has their own personality