Literary Tattoos! What! You mean you don't have your favourite Persephone Books quotation across your shoulder blades? Well, actually me neither, but have a look at this.
Tattoos are obviously a form of communication and often a written one. You can't get more economical than 'love' and 'hate' across your knuckles; eat your heart out Hemingway.
I have had an interesting book on the subject in stock, Written on the Body edited by Jane Caplan ("Substantial collection of essays covering many aspects of the social, political or semiotic significance of the tattoo. Covers: late Roman Empire, Early modern England, Australian convicts, Indian convicts, class, religion, Celtic tattooing and much more ") but have long since sold it. Copies can be had from Amazon though don't get it confused with the Jeanette Winterson novel of the same name.
Edited to add: thanks to Mae for this link to more literary tattoos. As I said in the comments hats off to anyone prepared to get four full lines of Longfellow permanently applied to themselves (in the post called Life is real!).