The discussion centers on identifying a key textbook for Quantum Mechanics that parallels the significance of Goldstein's text in Classical Mechanics. While J. J. Sakurai's "Modern Quantum Mechanics" and Leslie Ballentine's "Quantum Mechanics: A Modern Development" are highlighted as popular graduate-level texts, it is suggested that Schiff's "Quantum Mechanics" shares characteristics with Goldstein's work, such as being a classic choice with limited competition during its peak. The conversation notes that Goldstein's text is now seen as somewhat dated and is not universally adopted in modern curricula, with some institutions like Princeton moving away from it. The mention of Jackson's text indicates a shared sentiment about the challenges faced by students in classical physics. Anticipation is expressed for Mahan's upcoming quantum mechanics book, which is expected to provide a fresh perspective in the field.