Carlos Ruiz Zafón said this quote
“ He was a very private person, and sometimes it seemed to me that he was no longer interested in the world or in other people... I got the feeling that Julián was living in the past, locked in his memories. Julián lived within himself, for his books and inside them - a comfortable prison of his own design.You say this as if you envied him.There are worse prisons than words. ”