I also wrote up a little tutorial for those of you who have commented about my backgrounds and would like to know how to make them yourselves. I also get several emails from people who want to use images from my page on their web page. My answer to this question is I don't mind if you want to take a few images to add to your page. Like, you have a Sailor Mars Shrine and want to add some Mars coloring images to your page. All I ask is that you don't take every images off my page and set them up on your own page as your own.
Auctions are also a good source for coloring books, but the prices can get much higher.
It is really like a treasure hunt. They are out there, you just have to look, really hard. Some people just don't know how to appreciate what is given. Saying thus, I will from here on ignore all of these emails. If you have a coloring book that is not already on this site and would like to share it with others.