Professor Johnson has made outstanding contributions to developing and applyingrelativistic correlation theory (relativistic many body perturbation theory)to atoms,and this book is an excellent modern treatment presented at the 2ndyear graduate student level (i.e. to those who have 1 year of graduate quantummechanics).The book is a nice mixture of formalism and computation-seldom seenin textbooks-which reflects the author's abilities and interests. The priceis quite reasonable.The book should be of interest to quantum chemists,condensedmatter computationalists,nuclear and atomic physicists,as well as those justinterested in the formalism.