Magnifier

After her mother died under suspicious ocation,Hannah decides to investigate her mothers death by herself.

Once she starts finding clues,everything seems to fit in. It's like a puzzle. She just needed another proof to shut the person that killed her mother behind the bars.

"I was sitting in my hotel room in the North London,when a yellow envelope slided under the door. I picked it up and opened the door to see who left it,but no one was in the hallway. I opened it and started reading the letter. It was written with a red ballpoint. At least I thought it was. "The moon orbites around the planet Earth without stopping. A cat has nine lives. But what happens if the moon stops moving and the cat spends all her nine lives on that little mouse that she'll never catch?" I was really confused. What did that mean? Who left the envelope?"