Rainbow

Help each other out and add titles that have a Rainbow on the cover. Any Rainbow will do, be it the colors of the rainbow for the whole cover, a rainbow flying out of the ass of a unicorn or a rainbow in the clouds. if it looks like a Rainbow and you can see it on the cover you may use it for this Essential. Feel free to send us a link of your own list with titles that fit the description to this Essential

Note: Covers sometimes change, it is enough to know that there is a cover to the title with a Rainbow on it, but if you want to be on the safe side, you can add a picture.