an early hometime?

'a anocment went off' "all students I repeat all students PLS go home early" it said. I was astonished. Just like everyone else. But I did what it said I picked up my bag and went home. As I was walking home I was trying to figure out what had happened before lunch. I mean how can powers like that even be possible I thought. I felt a tap on my shoulder while passing a tiny house, I turned over and saw a old lady who was selling old stuff. "oh sorry I'll have a look but I can't buy anything yet" I told her. "oh that's fine" the old lady said. I looked around the old junk intill I saw something that I wanted. A book titled the mother with powers. "How much for this" I asked

"oh that" the old lady said while looking at it

"you can have it for free" she said. "ok" I said while walking home