The discussion centers around finding reliable online reviews for college physics textbooks. Participants suggest using Amazon for reviews, although some express frustration with the limited number of reviews for specific titles. Recommendations include consulting university reading lists for required texts and using forum search features to find discussions on particular books. Key titles mentioned include Feynman's Lectures on Physics, Kolenkow and Kleppner, and Purcell, which are considered essential for a physics library. One user notes the challenge of finding reviews for specialized topics and shares a link to a site dedicated to textbook reviews. Overall, the conversation emphasizes the importance of community input and existing resources for making informed textbook purchases.