This paperback copy of "Troubled Sleep" has been signed on the inside front cover by Jean-Paul Sartre in black ballpoint or biro pen. This Vintage Books edition shows numerous signs of wear, some bending of cover and toning of page edges. First free endpage is partially separated. The signature was obtained through the mail, and is from the collection of prominent collector Tom Grafton. This is one of two signed Sartre books I own.