Could that be 420 Characters by Lou Beach? The cover matches your description too. "GERONIMO!" I leap from the trestle high above the river, imagine myself parachuting into occupied France during WWII and meeting up with Marie, a beautiful dark-haired fighter of la Resistance. We kill some Krauts together, then hide out in the hayloft of a barn. I draw her to me, kiss her neck, her full red lips, unbutton her tight white blouse, and hit the cold water. "Sacrebleu!" I scream. "Sacre fuckin bleu!"
