Ishmael. The reply was more about the note that I'd left than the book itself. Though, they thanked me for the book and felt that it'd be something they might appreciate later in life. They said that it was too deep for them and they weren't able to understand it all. I replied and told them that I'd read it multiple times, at different stages in life, and that I'd not fully understood it either - that I took something new away with each reading.