Amazon is offering a buy two, get one half off promotion on paperback books, applying a 50% discount to the lower-priced item when two eligible titles are added to the cart. The promotion is part of a broader book sale on the platform, with box set offers highlighted. Eligible titles include the first two Dungeon Crawler Carl paperbacks, Andy Weir's Project Hail Mary, the Sarah J. Maas ACOTAR box set, the Throne of Glass series, the first three books of Frank Herbert's Dune series, the four-book Hunger Games collection, and the Divergent box set. Items must be added to the cart for the discount to apply automatically at checkout. The promotion runs for the day and may appeal to readers seeking discounted paperback editions, though the selection of box sets is limited.