How does Robert Ludlum use imagery in The Bourne Supremacy?

Examples of Imagery:

"The killer surveyed his work. Satisfied, he knelt down by a large, stagnant pool of blood and moved his index finger through it. He then pulled out a square of dark cloth from his left sleeve and spread it over his handiwork. He rose to his feet and rushed out of the room, unbuttoning the white caftan as he ran down the dim hallway; the robe was open by the time he reached the door to the cabaret." Chapter 1, pg. 8.

"And then it happened, slowly, subtly, no heralding trumpets, an entrance devoid of drama. A second figure appeared; he walked casually out of the shadows, parting the final branches of the forest as he came into view. And, without warning, bolts of lightning streaked down from the night sky, burning, searing into David Webb's head, numbing the mind of Jason Bourne. "For as the man came into the light of the fire, Bourne gasped, gripping the barrel of the gun to keep from screaming - or from killing. He was looking at a ghost of himself, a haunting apparition from years ago come back to stalk him, no matter who was the hunter now. The face was at once his face yet not his face." Chapter 16, pgs. 238-239.