A discussion on introductory books for partial differential equations (PDEs) highlights several recommendations tailored for physics majors seeking applied content, particularly with a focus on Fourier methods. "Partial Differential Equations in Physics" by Arnold Sommerfeld is praised for its application-oriented approach and includes exercises with solutions, making it suitable for physicists. Participants suggest supplementing this book with easier texts for foundational practice, especially for those unfamiliar with Fourier series. Other recommended titles include "Introduction to Partial Differential Equations" by Yehuda Pinchover and Jacob Rubinstein, which is noted for its accessibility, and Haberman's book, which is application-focused. Concerns about the cost of newer editions lead to discussions about the adequacy of older editions, with some users noting that the second edition may lack coverage on certain topics relevant to quantum mechanics. Overall, the conversation emphasizes the importance of problem-solving exercises and the balance between rigor and accessibility in selecting PDE textbooks.