The discussion revolves around selecting textbooks for upcoming math courses after completing calculus levels 1-4. The original poster, a math major, is considering linear algebra and analysis as potential subjects but lacks specific course information. Participants emphasize the importance of consulting a course catalog or academic adviser to determine required textbooks, rather than purchasing random books. There is a mention of the variability in math curricula across universities, highlighting the need for tailored advice. The poster notes the availability of older editions of textbooks at low prices, indicating a willingness to explore these options while awaiting further details on course requirements.