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I picked it up and headed back to the shelf. Once there, I wiped the dirt from my hands and that brought a thought to mind. My eyes went back to the bookshelf and landed at the top. I didn't know why but I was drawn to that spot, and in one swift movement, I wiped the handkerchief/ rag over a particular dusty spot and what it revealed had me giddy like a six year old.

"Yesss!" I cried out in pure excitement. " I found it!"

"G18?" Zoe called. " Where is it?"

"No, no, not G18." I toned my voice down a little. " This is A1 but you know what that means, right?"

"Yes." Zoe didn't sound too thrilled to be looking around more bookshelves but I bet she wanted to get to the bottom of all of this, just like I wanted to. " If there's an A1, then there's supposed to be a G18 too."

"Exactly." And with that, I set out to work immediately. The other shelves were even more dustier than the previous ones. I was searching in no specific pattern but the more I searched, the more dejected I started to f