Here are some notes and solutions to accompany the book Student Friendly Quantum Field Theory by Robert D. Klauber (Sandtrove Press, 2013).
[My apologies for jumping around between an increasing number of quantum field theory books, but I’m looking for one that presents the subject in an understandable way. Klauber’s book looks the most promising, although he treats only quantum electrodynamics (and not the weak or strong interactions) and does it using the canonical quantization approach which seems to be considered somewhat out of date, compared to the path integral formulation. However, I’m just looking for a relatively easy way into the subject at present and hopefully once I’ve got that, the other books will become more accessible.]
If anyone knows of a truly introductory book on QFT, please do leave a comment.
Chapter 2: Foundations
Chapter 3: Scalars: Spin 0 Fields
Chapter 4: Spinors: Spin ½ Fields