Demon Princess and one yellow book

Charlie

Father, I have found this book, and it's been interesting but strange... It's about an ancient city called Carcosa, ruled by the King in Yellow.

Lucifer

Charlie! Where did you find this horrid thing?

Charlie

I-I found it in front of my hotel the other day.

Athagar the Yellow King

Any who have learned of the king, will forever be within his sights...

Athagar the Yellow King

Balance demands reckoning, Morningstar. Your daughter's eyes have read my name.

Lucifer

Leave my daughter alone, elder god! I will not let you harm her!

Charlie

Dad, it's alright. I dont think he means to harm me.

Athagar the Yellow King

Indeed, princess of hell, I will not harm you. But you have read my lost texts. And now that you know of me. I will watch you till your natural end.

Charlie

So what now then? Are you like a guardian elder god or something?... Do you want your book back?