Pages is an Minecraft mod that adds addiitonal pages to the Minecraft mod Mystcraft. The CurseForge project page is located here: https://minecraft.curseforge.com/projects/pages
If you would like to contribute block ideas, the best way is to make a pull request for https://github.com/TheFloydman/Pages/blob/master/src/main/resources/assets/pages/blocks.csv. For information about what each column does, see https://github.com/TheFloydman/Pages/wiki/CSV.