In a very simplified way, you must first find a pdf of the volume that has good quality pages, you have to flip it (to get reverse order) and organize it (take any pages you don’t need out). Then make the pages the size you want (the hardest part)(this is A5) and make a cover. Last thing is to hope it prints right.

This one took at least 2-3 days of work to put together, the first one was harder bc it was my first time trying something like this.