See that book image? Look closely at the green-skinned alien in the upper corner. Frightening little guy, isn't he?
I found this book at the local supermarket and bought it for Kid #1. Stonehenge, the Loch Ness monster, UFOs: it was screaming out his name. He read most of the volume, then returned it to me with a tremble. He declared that I never should have purchased the thing because the alien on its cover is so so so creepy.
He awakened me at 3:28 this morning, right after the nightmare that this image provoked had awakened him, to ensure I got his point.