In a show full of quests and magical items, it is the most special. The Enchiridion, Adventure Time's ancient and sacred tome. The iPad isn't quite as special, but this awesome cover lets you pretend it can be.
Made by HarryDumitrescu, it's built from "fake leather", drawn with a Molotow graffiti pen and then covered in a clear finish to give it that book-y look. The brackets are made of metal.
No word on whether HarryDumitrescu is dressed like an adorable little key, but let's hope.