Source: /cirosantilli/an-introduction-to-quantum-field-theory-by-peskin-and-schroeder-1995

= An Introduction To Quantum Field Theory by Peskin and Schroeder (1995)

https://www.amazon.co.uk/Introduction-Quantum-Theory-Frontiers-Physics/dp/0201503972

This is very widely used in courses as of 2020, it became kind of the default book.

Unfortunately, this approach bores <Ciro Santilli> to death. Or perhaps is too <the missing link between basic and advanced>[just advanced for him to appreciate]. Either of those.

800+ pages.