The discussion centers around the availability of free online textbooks in math, science, and computer science, with participants sharing various links to resources. There are concerns about the legality of redistributing these texts, emphasizing the importance of ensuring that shared links comply with copyright policies. Users express appreciation for the quality of the books and discuss specific titles, particularly in quantum physics, while clarifying authorship of notable works. A controversial phrase from one textbook raises questions about its appropriateness for educational contexts. Overall, the conversation highlights the value of accessible educational resources and the ongoing debate about their distribution.