Principles of Algebraic Geometry is a monograph on algebraic geometry written by Alexander Grothendieck with the help of Jean Dubai. From 1960 to 1967, it was published in the mathematics journal of the Institute of Advanced Science in eight parts, with a total of 1700 pages. This book bases the basic system of algebraic geometry on the concept of cover type, which is considered as the fundamental work and basic reference book of modern algebraic geometry.