It's doable if you’ve already taken a solid course in undergraduate Quantum Mechanics and Statistical Mechanics.
The writing is conversational and energetic. The authors often "speak" to the reader, acknowledging when a derivation is tricky or when a particular approximation is a leap of faith. This makes a dense subject feel much more approachable. 4. The "Altland & Simons" Difficulty Condensed Matter Field Theory, Second Edition
It is arguably the best primary textbook for a many-body physics or QFT course. It's doable if you’ve already taken a solid
You need a very strong handle on linear algebra and complex analysis. Condensed Matter Field Theory, Second Edition