The Legend of Nightmares

"Sister, tell me again where you put my diary?" Luna looked to her elder sister, clear annoyance on her face.

"That dusty old thing? Why do you need it?" Celestia replied.

"Because, it holds information that needs to be published. We need our ponies to remember and to remember that we were stronger than them, Celestia." Luna grunted.

"I had it stored in the Library. In the unlit portion, where no one would usually tread." Celestia said.

"Ugh." Luna responded, then ran to the Library, only to have to run back to her sister.

"It's not there."

"Oh, yes, I gave it to Twilight Sparkle." Celestia smiled playfully.

"Sister! That held important research notes! And it holds what happened during the Nightmare Times. I'm going to get it and burn it." Luna responded, her anger clear on her face.

--Later--

"Twilight and friends." Luna said from the doorway into Twilight's basement.

"Oh! Princess Luna, how nice of you to visit! Anything we-"

"Cut the crap, my friends. Twilight, the book?"

Twilight did, but reluctantly, handed the book over.

"May we ask some questions?"

Luna sighed as she folded her wings back up after they flared out.

"There was a war that no one wants to talk about. People died. Nightmares were killed. Nightmares were also born, like people. They are there, and we have an agreement, which may not hold for long. The Forces of Equestria are trying to keep this nation together. We have Chrysalis on our side and Sombra is dead. Nightmare Moon is dead, nothing more than ash. It'll be fine, but only if you keep your noses out of this."