I was thinking about gltichtrap and Fourth Closet and I came to a conclusion! As we all know William Afton is in glitchtrap. In Fourth Closet Springtrap told to Charlie that he is moving to new body part by part. Vanny is helping glitchtrap. In Fourth Closet an animatronic, which was Charlie was helping William. Maybe now Vanny is helping William to escape the glitchtrap part by part?

I know that fnaf books are only alternative universe of fnaf but when I joined these 2 facts I thought that It is purposeful