Carlos Ruiz Zafón said this quote

“ This is a place of mystery, Daniel, a sanctuary. Every book, every volume you see here, has a soul. The soul of the person who wrote it and of those who read it and lived and dreamed with it. Every time a book changes hands, every time someone runs his eyes down its pages, its spirit grows and strengthens. This place was already ancient when my father brought me here for the first time, many years ago. Perhaps as old as the city itself. Nobody knows for certain how long it has existed, or who created it. I will tell you what my father told me, though. When a library disappears, or a bookshop closes down, when a book is consigned to oblivion, those of us who know this place, its guardians, make sure that it gets here. In this place, books no longer remembered by anyone, books that are lost in time, live forever, waiting for the day when they will reach a new reader's hands. In the shop we buy and sell them, but in truth books have no owner. Every book you here has been somebody's best friend. Now they only have us, Daniel. Do you think you'll be able to keepsuch a secret?' My gaze was lost in the immensity of the place and itssorcery of light. I nodded, and my father smiled. ”