Sleep is for the weak.
Iain Banks, Roger Zelazny, Elmore Leonard, Norman Spinrad, Bret Easton Ellis, George R. R. Martin, Warren Ellis, Poe, Alan Moore, Cormac McCarthy, Dan Simmons, Frank Herbert, Niccolo Machiavelli, Garth Ennis, Homer. H.R. Giger, Leonardo Manco, Goseki Kojima, John McCrea, Frank Miller, Steve Pugh, John Brack, James Gleeson. No, the tiger stripes are not natural.