Surprised to not find Tong's notes for qft [1] (his other notes are great too). That's the only clear source of introductory QFT (and I have none for advanced Q

Surprised to not find Tong's notes for qft [1] (his other notes are great too). That's the only clear source of introductory QFT (and I have none for advanced QFT). Of course the only real way to learn QFT is to learn it multiple times from various sources, but you usually have exam after the first one, and Tong may get you through it. [1] https://www.damtp.cam.ac.uk/user/tong/qft.html https://www.damtp.cam.ac.uk/user/tong/qft.html