I haven't read this book, I have no idea what book you're even reading, this is purely speculation, but... That phrase sounds like a Harry Potter title. So maybe it's trying to reference a Harry Potter title as a joking aside? Like a meme-type thought? Again, purely speculation.

My city is performing the Dracula ballet this weekend, and I'm going to see it Saturday! I am so excited! I wanted to read the book first, but with grad school, I've not had the time. But so excited, nonetheless!