“… is divides into three parts of roughly 100 pages each. … written for people who have a basic understanding of the subject and who wish to see what’s happening behind the scenes. … material more accessible. ” — Donu Arapura, Purdue University, in Siam Review, Vol. 48, No. 3 “This book offers a novel and complete treatment of the Deligne theory of mixed Hodge structures on the cohomology of singular spaces. … well-written for an advanced level text ant it is valuable to beginning researchers as an introduction to an important and beautiful mathematical subject. The book will also serve as a good reference for further research work.” — Vagn Lundsgaard Hansen (Lyngby), in Zentralblatt MATH 1088