Weinberg's textbook on quantum field theory, titled "The Quantum Theory of Fields," is widely regarded as a comprehensive and authoritative resource on the subject. It consists of three volumes:
"Foundations": This volume covers the basic principles of quantum mechanics and field theory, including topics such as classical field theory, canonical quantization, and path integrals.
"Modern Applications": This volume delves into more advanced topics in quantum field theory, such as renormalization, symmetry breaking, and the standard model of particle physics.
"Supersymmetry": The third volume explores supersymmetry and its implications for particle physics.
While Weinberg's textbook is highly regarded for its coverage of quantum field theory, it does not specifically focus on quantum gravity. Quantum gravity is a complex and challenging field that involves the unification of general relativity and quantum mechanics. While Weinberg is a renowned physicist and has made significant contributions to the field of theoretical physics, his textbook does not extensively cover quantum gravity.
For studying quantum gravity specifically, you may want to consider other resources that focus on that particular topic. Some notable textbooks on quantum gravity include "Quantum Gravity" by Carlo Rovelli, "String Theory and M-Theory: A Modern Introduction" by Katrin Becker, Melanie Becker, and John H. Schwarz, and "Gravity: An Introduction to Einstein's General Relativity" by James B. Hartle.
It's worth noting that quantum gravity is still an active area of research, and our understanding of it continues to evolve. Therefore, it's advisable to consult multiple sources and engage with the latest research papers and developments in the field alongside any textbooks you choose to study.