...a much needed and highly recommended textbook in a beautiful, deep, and actively developing field.
Zentralblatt fuer Mathematik 871/97
Pillay's book...is definately not a textbook, and is aimed at the advanced graduate student and the researcher in the field....................it is a marvellous book which contains almost all the deep results and difficult machinery in the subject................Pillay's book should be on the table of anybody doing research in the fiels
London Mathematical Society Book Reviews 1997