'Nguyen Thieu Lau (1916-1967) is a talented scholar with serious, careful and scientific historical research. This book is a collection of nearly all of his published articles and essays. These documents were collected and published by his family and friends after his death. With the wish to write a history book in his mother tongue, Nguyen Thieu Lau has gradually revived events and characters that have been little or never studied thoroughly, pointing out biased and emotional historians. He paid special attention to the XIX century with both heroic and tragic events in the construction and protection of his father's country. His writings deserve a unique cultural heritage, bringing a lot of valuable research materials and views.