“Potter, Black, before you come up with such nonsense I suggest you read Hogwarts, A History,” Professor McGonagall snapped at them after suggesting the founders were Animagi currently living in the lake.
The exchanged looks and mimicked her sour expression and laughed in silence.

After class, the boys made their way to dinner. When they went back up to the Common Room, they spotted Lily sitting near the fire with a pile of books surrounding her.
“Hey Evans, can we borrow that?” Sirius asked.
She looked up and handed them Hogwarts, A History, “Take care of it,” she said nicely.