I offer combined shipping and ship with Gemini mailers to protect the books. For comic issues Combined media mail shipping costs are first item shipping + $0.20 per comic after (Certain high value comics are insured and ship via Priority Mail and are not eligible for combined shipping with issues shipped via media mail). Combined shipping for graphic novels or hardbacks are calculated by weight and do not qualify for the $0.20 rate, and do not combine with comic books.