Night stalker

Late at night, lying on the bed in a hot Caravan another new place. The window's open but no breeze, uncovered, reading my book before I turn in. A rustle outside. I stop, listen, nothing but my imagination working overtime. I continue to read, there it is again rustle, rustle, I feel the panic rise who's there outside I'm alone. My throat dries, dare I look out the window, rustle, rustle. I know someone's there, cold sweat beads on my forehead, my heart racing I hold by breath, then I hear his low deep voice
"I know you're there alone"