Summarize the following:
These aren’t absolutely necessary to sell a print version of your comic book, but they make distribution and retail much simpler. An ISBN number identifies your book by the title, cover and page number while the barcode allows it to be scanned. This gives you the option to sell your books in stores, be they online or brick and mortar. While any version of a comic book will need a cover, it’s especially important for printed comic books. You can draw and design your own cover, or you can collaborate with other artists for a different look. If you decide to stick to selling in online stores, the cover will be crucial for identifying your book, especially if you’ve bought an ISBN number. You can research print-on-demand companies to choose the one that benefits you. However they all work in essentially the same way; they handle the printing for you and only print copies as they’re ordered. This means you won’t have to hoard hundreds of copies of your comic book and ship them out yourself. The important thing to keep in mind is comparing the cost of this service to the advantages. A proof copy is a printed version of your book that you can review for errors before your comic goes to print. You’ll likely have to pay a fee, but you’ll get a good idea of what your comic book is going to look like when your readers order it. You might find that certain design choices that look good on a computer screen don’t look as good in print, and you can review them before the comic book is in the hands of your readers. While you’ll find comic books from major publishers on store shelves, it’s more difficult for independent comics to break into the same distribution networks. Instead, market to your readers directly. You can use an online platform like Amazon to handle the actual transaction and shipping; use social media and traditional networking to get your book out where readers can see them.  If you want to deal with your readers directly, you can use an online marketplace such as Etsy to sell to them directly. You’ll need to handle the shipping of the comics yourself however. A popular method of marketing comic books is buying a table at comic book conventions. There you can sell your books in person and offer autographed versions.

Summary:
Buy an ISBN number and barcode. Design and add a cover. Send your comic book to a print-on-demand company. Order a proof copy of your book. Sell to readers directly.