You're in the city library. Every Friday you always come here because indeed you have scheduled this. When you're there, you always see the same guy. Bcs you see him too often, you know his name. He also knows your name, but you two are not friends. He is a quiet guy and seems very smart. He prefers to sit by himself. But one day, you have trouble picking up the book on the top shelf. It turned out that someone took the book, it was he. He climbed the stairs beside you and picked up the book.