A message ?

Suddenly something flew and hit me square on the chest. I looked around but could not see what it was.  I heard a soft rattling sound. I tried to pinpoint where the sound was coming. It was very faint, but it seem to be coming from the book shelf. I grabbed the candle and move closer to the book shelf.  A rustling sound of sorts was coming from there.Where was it ? What was it ?

Looking up and down I still could not find it but I could hear it. Rustling amongst the books. Somewhere. Could this be the help I needed or just another weird apparition from this strange place ?