This story is a sequel to The Dreams of Pinkie Pie

Princess Luna has a bunch of reports on dreams that she's been documenting ever since she's delved into the mind of Pinkie Pie leading up to Nightmare Night. Intrigued by the notion of nightmares, she's chosen to document many dreams but none intrigue her more so than Princess Twilight Sparkle.

Now with an audio reading by Lotus Moon! She did an awesome job and placed both the prequel, Dreams of Pinkie Pie, and this one into the same video.