The discussion focuses on recommendations for affordable multivariable calculus books. A highly suggested title is "Functions of Several Variables" by Wendell H. Fleming, available for $8.97 from a specific bookseller. Another recommended pair is "Differential and Integral Calculus Vols 1 and 2" by Richard Courant, priced at $20. The conversation highlights the importance of finding used copies for cost savings, with one participant emphasizing the condition of the books. There is a mention of the website abebooks.com as a resource for locating these titles at competitive prices, although some participants express unfamiliarity with the site. Overall, the thread centers on sourcing economical options for multivariable calculus literature.