The main mission of the ADS is to promote August Derleth and keep his works in print. Below, are books that can be purchased directly from the ADS. A great gift for the holidays! You may pay online, but if you do so, you will be charged an additional convenience fee to cover the cost of Credit Card\Debit Card processing. If you’d like to avoid fees and possibly save on shipping, we will accept check payment – e-mail us for more information before making your order!