@JeremyECrawford RAW a wizard's spellbook can vary (from a tome to scraps of paper), would be ok if he tattoos his spells on his skin?

— Dan Powell (@aloadofbullshit) June 24, 2015

I think the wizard would run out of skin to tattoo. And reading a spell on the back would be tough! https://t.co/qIkZkf72Ql

— Jeremy Crawford (@JeremyECrawford) June 24, 2015