The discussion centers on the 2017 reissue of "Gravitation" by Misner, Wheeler, and Thorne, which remains largely unchanged from the original 1973 edition, except for a new foreword by Kip Thorne. While the first chapters are still valuable for understanding general relativity, the new edition includes an appendix discussing updates on cosmological processes. Participants inquire about a giveaway related to the book, clarifying how to enroll and expressing surprise at the high shipping costs for the book. The conversation also touches on the book's price on Amazon, which some find surprisingly low compared to expectations. Overall, the thread highlights both the book's enduring relevance and the logistics of obtaining it.