Carlos Ruiz Zafón said this quote
“ Don Ricardo wanted a successor worthy of himself. Jorge would always be cocooned in the privileges of his class, hiding from his mediocrity in creature comforts. Penelope, the beautiful Penelope, was a woman, and therefore a treasure, not a treasurer. Julian, who had the soul of a poet, and therefore the soul of a murderer, fulfilled all the requirements. It was only a question of time. ”