At the mention of his book, Remus thoughtlessly glanced upward, almost seeming a little surprised that Sirius had asked. Straightening his posture against the headboard, Remus brought the book back into his own view, eyes barely skimming over the title before offering it to Sirius.<br/>“From the Earth to the Moon, A Direct Route in 97 Hours and 20 Minutes,” he mused, with a grin and an ease that betrayed the fact that it was an old childhood favourite. That in and of itself felt like a degree of vulnerability Remus had yet to show to Sirius, but spoken in their dorm room, both studying astrophysics, Remus almost like he had bared something that was fundamental to why he was even here.<br/>It made his smile turn sheepish.<br/>“Do you know it?”