Time Travel

Whirrrrrr. Whirrrrrrrrrrr. Scratch Scratch. Scritch. My eyes popped open. I didn't want to get out of my little nest I made. I had settled in the middle of two bookshelves, lying on my blanket and using my backpack as a pillow.
Scratch Scratch. There was that sound again. I fished out my flashlight and flicked it on. The room was entirely empty. Where was the sound coming from? Scritch Scrittttch. Sounded like something was dragging itself. I felt my hands grow clammy. This stupid old library...probably my mind playing tricks on me. But the sound persisted. it sounded like it was coming from an old radiator that was by the back wall.