The discussion centers on finding an advanced undergraduate mathematical physics textbook that includes answers for self-study. The Mary Boas book is mentioned positively, but the user is seeking additional recommendations. Specific topics of interest include Fourier methods, Laplace methods, Bessel functions, differential and integral equations, boundary value problems, calculus of variations, analytic functions, and linear algebra. The user appreciates "Mathematics for Classical and Quantum Physics" by Byron and Fuller for its content but notes the lack of answer keys. Other suggested texts include "Mathematical Methods for Physicists" by Arfken & Weber and "Mathematical Methods for Physics and Engineering" by K.F. Riley et al., both recognized for their comprehensive coverage of relevant topics.