He sneaked inside
He peered around to check if anyone was observing him, and when he felt safe, he hurriedly opened the door and entered. He held his breath, unsure of what lay behind it. Fortunately, he had entered an empty corridor. Where should he go from here?
Taking a risk
He was completely unaware. He decided to go around and look at all of the doors. This may take some time, and he hoped no one else came in while he was there. He’d never be able to get the book back if something happened…