What are literary devices in A Solitary Blue?

Simile:

"He had discovered how to step inside that room and slide the curved door closed and bolt it across....If the room were not there, he would fall apart, disintegrate like music broken into individual melody lines, the lines turning into notes, the notes exploding into unconnected sounds, the sounds dissipating into space itself."

"Her feelings washed over him, like waves, and he didn't know how he'd let this happen."

Imagery:

"But Jeff had made himself a place, inside himself, a kind of tower room, round, without any windows. In that room, he had locked his memory of the beach on the island, all the memories from the day hours and from the night hours. He had discovered how to step inside that room and slide the curved door closed and bolt it across...."

"One of the small ponds came into view. A solitary blue heron stood at its edge, half hidden in the pale marsh grass....The heron occupied its own insignificant corner of the landscape in a timeless, long-legged solitude."