The discussion centers on recommendations for mathematical methods books, particularly focusing on linear algebra and quantum mechanics. Participants express mixed feelings about the book "Boas," noting it is rigorous but may not be ideal for self-study due to its dense presentation. While some find it useful for reference and problem-solving in physics and engineering, others suggest that it lacks depth for those unfamiliar with the foundational concepts. There is a consensus that prior knowledge in calculus and linear algebra is beneficial before tackling Boas. Recommendations for linear algebra include "Linear Algebra" by Hoffman and Kunze, "Finite-Dimensional Vector Spaces" by Halmos, and "Advanced Linear Algebra" by Roman. Additionally, "Advanced Mathematical Methods for Maple" is highlighted as a valuable resource for learning techniques like asymptotic expansions and perturbation theory, which are often overlooked in standard methods books.