How does Robin Cook use imagery in Mutation?

Imagery:

"'Gotcha!' he said, playfully grabbing the boy's leg. "At his touch, VJ leaped up, his hands ready to defend himself. "'Whoa! Were you concentrating or what?' Victor said with a laugh. "VJ's turquoise eyes bore into his father. 'Don't ever do that again!' he said. "For a second, Victor felt a familiar surge of fear at what he had created."

"At the western corner of the property and dominating the site was an eight story clock tower designed as a replica of Big Ben in London. It soared above the other buildings from the top of a three-story structure built partially over a concrete dam across the Merrimack. With the river as swollen as it was, the millpond behind the dam was filled to overflowing. A thunderous waterfall at the spillway in the center of the dam filled the air with a fine mist."