The discussion revolves around the challenges faced by a graduate student in a statistical mechanics course where the instructor does not recommend a specific textbook. Participants express frustration over the lack of guidance, emphasizing that without a clear syllabus or suggested readings, students are left to guess what materials will be relevant. Suggestions for textbooks include "Landau and Lifshitz," "Pathria," and "Huang," with some participants noting that previous students' experiences could provide valuable insights. The conversation also raises the question of whether a textbook is necessary if the professor provides comprehensive notes. Overall, the need for clearer direction from the instructor is a central concern, as it impacts students' ability to prepare effectively for the course.