Shipping comics using Media Mail
Since misunderstanding this could cost you thousands, let’s get it straightened out now.
Here’s the passage on the USPO Web site regarding comics and Media Mail — with the pertinent passage in bold.
Media Mail packages may not contain advertising. Comic books do not meet this standard. Books may contain incidental announcements of other books and sound recordings may contain incidental announcements of other sound recordings. In accordance with standards in the Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM), Section 170, Media Mail packages must have a delivery address and the sender’s return address and are subject to inspection by the Postal Service™. Upon such inspection, matter not eligible for the Media Mail rate may be assessed at the proper price and sent to the recipient postage due, or the sender may be contacted for additional postage.
So, if you’re shipping graphic novels that do not contain advertising, you can use Media Mail to do so — as long as those graphic novels don’t contain ads.
If you’re shipping floppies — i.e. monthly comics that contain advertising — then you may not use Media Mail.