Amazon has officially launched its '3 for 2' book sale ahead of Prime Big Deal Days, and it includes a number of hardcover Dungeon Crawler Carl books. These types of sales are the best possible time to start your collection of Matt Dinniman's hit LitRPG books for cheap. Not all of the Dungeon Crawler Carl hardcover books are eligible for the sale, however. A Parade of Horribles, the latest book in the series, is included alongside five other books. The second and third books are missing, but they do have their own separate discounts. Buy 2, Get 1 Free Dungeon Crawler Carl Books Amazon is already one of the best places to buy books at a discount, so these types of sales are perfect if you're looking to buy every book in a series. And while not every Dungeon Crawler Carl hardcover book is getting discounted here, there's enough of them here that you can still take advantage of this sale tw