I imagine a voice that sounds like Sir Anthony Hopkins as the character Frank Doel in the movie 84 Charing Cross Road, one of my favorite movies.
"Carol, I've found a very good used copy of An Illustrated Encyclopedia of Clematis by Mary Toomey and Everett Leeds (Timber Press, 2001) which I see is on the list of books you want. It is in excellent condition and the price is as low as I've seen