The discussion centers on recommendations for introductory books on writing mathematical proofs. "How to Prove It" by Daniel Velleman is frequently mentioned as a well-structured and accessible choice for beginners. Other suggested titles include "How to Solve It" by George Pólya and "Doing Mathematics: An Introduction to Proofs and Problem Solving" by Steven Galovich, though opinions on the latter vary. Participants emphasize the importance of practical exercises and the gradual introduction of proof techniques. The "Book of Proof" by Richard Hammack is also highlighted as a valuable resource for beginners. The conversation reflects a shared interest in enhancing proof-writing skills, particularly for those transitioning to more rigorous mathematics courses.