Click Click Click

A movement in between the books caught my eye. There it was...a cricket ! What was this creature doing ?
Why was it here ?

Questions streamed through my head. It seemed to be hovering around a particular book. I tried to make out the title. It was quite worn so the word were hard to read. I pulled the book out from the shelf. 
"DAWN" Could this be the clue which was written about earlier ? "the sun rises where the moon sleeps" ?
As I opened the book, a key dropped out on the floor with a loud clink. As I reached for the key, I noticed a faint writting on the key. Trying to read the inscription in the candlelight, the cricket flew and hit me on the chest again.
Was it trying to get my attention ? Can this be part of the clue ?