Heath ledger made the joker diary when trying to find his jokers personality and style and everything when the dark knight cast was introduced. He locked himself up in a hotel room alone and created the journal full of dark, gritty things, cards, hyenas. Either way, the book he used is called Elephant and Nemo from Eeboo. But I messaged Eeboo and they aren't making it anymore so its kinda rare. But this means a lot to me. So I need help finding Elephant and Nemo Composition Book that I can buy.