Oh that must have been heartbreaking for you and for him. Such an unfortunate misunderstanding that left you both feeling bad. Probably made slightly worse because you weren't able to chat to him about it the next day! Have you ever crossed paths with him since? Yes, that's quite an influential book. I read it many years ago and the other day I saw a copy in my son's room! He'd bought it to read too. I found that quite incredible. :)