"Fields" by Warren Siegel
Siegel (http://inspirehep.net/author/profile/W.D.Siegel.1?ln=ru) published a preliminary version of 4th edition of his online book on Classical and Quantum Field Theory and basics in String Theory. New edition already contains more than 970 pages (3rd edition had 885 pp.). Siegel added sections on AdS/CFT correspondence, vertex operators in String Theory, coset models and many others.
Highly Recommended!
Siegel (http://inspirehep.net/author/profile/W.D.Siegel.1?ln=ru) published a preliminary version of 4th edition of his online book on Classical and Quantum Field Theory and basics in String Theory. New edition already contains more than 970 pages (3rd edition had 885 pp.). Siegel added sections on AdS/CFT correspondence, vertex operators in String Theory, coset models and many others.
Highly Recommended!
+The interesting universe Yes, sometimes it is. If you are looking for an entry-level textbook on QFT, you shouldn't start with this one.Oct 14, 2015
