Hi! I have studied about 70% of the textbook QFT for the Gifted Amateur by Lancaster and Blundell and I think that I am now ready to go to more advanced treatments. My thoughts were to go to Klauber's Student Friendly Quantum Field Theory as I have read that it is very pedagogical. Problem is that I do not know the level of this textbook. My final goal is to go through a textbook like the highly-praised textbook by Schwartz called Quantum Field Theory and the Standard Model(I have tried to use Peskin and Schroeder's textbook and I have read the first 3 chapters-only the 2nd and 3rd have true meat though- but I found it to be very dry and unenthusiastic while I think that Schwartz's textbook is much more lively in its presentation) The problem is that I do not know what the level of Klauber's textbook is. How does it compare to the level of the textbooks by Lancaster & Blundell or Schwartz's? Thanks in advance!