The Book of Master Guigu is a book systematically summarizing the lobbying tactics of political strategists. The book was composed by Master Guigu of the Spring and Autumn Period, whose real name was Wang Xu. After being a hermit in Guigu (Ghost Valley), he called himself "Master Guigu".

The Book of Master Guigu is composed of the twelve chapters of Dividing Apart and Closing Together, Reacting, Internal Doorbar, Flying and Pinching, Preventing Fractures, Opposing and Converging, Fathoming, Approaching, Weighing, Plotting, Deciding and Tally Speech; the seven tactics of Secret Tallies and the two chapters of Chi Shu (pre-negotiation issue analyzing) and  Middle Classic.

The book mainly deals with the approaches and strategies adopted to gain interests in the complicated political arena filled with conflicts and disputes, with emphasis on constant opportunity seizing and decision making according to the changing situation. The principles in the book provide a whole set of theoretic bases and methodologies for political strategists.

Scholars today mainly study the book from the aspects of military and political tactics, so as to use it for reference in diplomatic rows and international military struggles of today. The Book of Master Guigu also had a great impact overseas. Oswald Spengler, the noted German historian and philosopher, hailed Master Guigu as an influential figure due to his insights into historical possibilities and the excellent command of diplomatic skills. Some scholars in Japan believe in Master Guigu’s theories and regard themselves as Guigu followers. Master Guigu's Theories and Methods of Psychological Tactics written by Chen Yinglue of Taiwan has been translated into English in the US. And many experts and scholars in Southeast Asian nations are engaged in the research of The Book of Master Guiguand there are academic institutions solely dedicated to the studies of Master Guigu's theories.