: Coverage includes scalar and fermionic fields, Quantum ElectroDynamics (QED), and non-Abelian vector fields like Quantum ChromoDynamics (QCD).

Before diving into the content, it is essential to understand the author’s credentials. Horatiu Nastase is a respected theoretical physicist at the Instituto de Física Teórica (IFT) at UNESP, São Paulo, Brazil. His research focuses on string theory, AdS/CFT correspondence, and gauge theories.

There are several key concepts that underlie Quantum Field Theory. These include:

The book contains approximately 100 exercises. QFT is a skill, not a spectator sport. If you cannot renormalize $\phi^4$ theory by hand, you haven't learned it.

: Extensive mathematical steps are provided to maintain rigor without sacrificing accessibility. The book is widely available in

A: Srednicki uses a "spin-first" approach and is incredibly logical but abstract. Nastase is more concrete and historically grounded. Use Srednicki for a second pass.

Nastase often provides updated lecture notes through university repositories or ArXiv that complement his published books.