The discussion centers on identifying classic texts in quantum mechanics, highlighting influential works that have shaped the field. Key mentions include Dirac's "Principles of Quantum Mechanics" (1930), regarded as the first textbook on the subject, and von Neumann's 1932 book, which focuses on the mathematical structure of quantum theory. The conversation acknowledges the significance of Shankar's "Principles of Quantum Mechanics," which is highly rated but not universally read. Other notable mentions include Messiah's textbook, Merzbacher's work, and Cohen-Tannoudji's reference book, which is recommended for its comprehensive content rather than self-study. The discussion also touches on the potential future classification of modern texts, like Weinberg's 2013 book, as classics. Overall, the emphasis is on the foundational texts that have established the principles and formalism of quantum mechanics.