3 great teachers by Robin Sharma. Trên đường băng( on the runway) by Tony Buổi sáng. In fact, there are many books, each giving me lessons at different times. I started up after reading the book on the runway. At that time, I was still a student and did not have enough perseverance and enthusiasm. At that time I failed. But I'm so happy that I dared to do it. :)