Do You Use Print-On-Demand?

Yep. POD publishing is a great way to let your fans get your work without having to invest a ton of money. Your profit margin (if any) is gonna be low, but again, you can provide a larger variety of products without having to print in bulk and carry a large inventory. Once you have determined that an item is popular, it may be worth your while to move on to a large printer, but Print On Demand (in my opinion) is a great way to start! Here's some good POD printers below.

Can You Recommend some good Books?

Yep.

Here are a few books for the Comicbook Creator, enthusiast, or self-publisher. the ones with asterisks* are SUPER HOT! But I recommend any and all of these books. I have all of them in my collection!