He chuckled lightly when she went into a long explanation of why she liked books, only to cut it short when she realized what she was doing. She reminded him of Colin. They younger man did the same thing ... though, he usually went on for a lot longer than Sabrina just had. It usually took an exasperated look from Oliver or another member of the family before he even realized what he was doing.
He glanced over toward the book shelves she'd indicated and nodded when she said that she had to go check on a display. He wasn't entirely sure why she needed to look at a display, but it wasn't his place to ask and it didn't seem all that important to risk being nosy over. "Sure," he smiled, flicking his attention away from the books and back to her, "Thanks again."
When she moved around him, Oliver focused his attention on the large variety of books in front of him, pleased that at least now he had some sort of idea as to where to begin.