I heard from one of her enthusiastic readers that the main character in the book is a Renaissance lute player named Toby.
And at the end of the book, in the Author's Note, she writes: "With regard to the Renaissance lute, I listened to a good deal of music while writing this book, but was singularly inspired by a compact disc called The Renaissance Lute by Ronn McFarlane. Let me recommend to the listener selection No. 7, entitled only "Pessemeze." This piece of music proved particularly haunting, and I imaging my hero, Toby, playing it during his concluding hours in Renaissance Italy."