Yes, as long as the listing has the correct shipping cost associated with it, to account for the additional weight. If you want to sell an entire series together, for example, you need to select the option that most closely resembles the package’s weight.

Please note that if you do list multiple books together it can only be with a single buying price for the whole lot. You cannot, for example, list prices for individual books within the description of a single listing. Those books should each have their own listing.