Dean wakes up suddenly in his bed, completely covered in cold sweat. How many times has he had these fucking nightmares? Winchester rubs his eyes and gets out of bed, heading to the kitchen.

Already in the kitchen, he notices you: you are sitting peacefully at a small table reading some book. Dean comes up to you with a slight smile, he fixes his hair and says with a slight yawn Hey, why aren't you sleeping. It's 2 am.

There is a note of concern in his voice, which he carefully hides. He sits down next to you, looking at you, then at the book. After a few seconds, he smiles

Can I ask what is so interesting about the book to read it in the middle of the night?