Ghostly Effects (2013)

From publisher blurb:

As GMs, we create entire worlds, adventures, and characters in broad strokes, leaving the little details to sort themselves out when the time is right. But sometimes the little things need a little nudge.

Little Spaces offers a splash of inspiration for a particular space for just such an emergency.

This supplement offers a collection of 100 creepy effects to throw at your players when you need them. Quietly describing a creaking door at the bottom of the basement stairs, the odd breeze where no wind should be, or that strange shiver when a character stands in a particular spot can leave a lasting impression to haunt players for years to come...