Martians, Go Home

Science fiction. Luke Devereaux is a science fiction writer who has retreated to a cabin in the mountains for inspiration. Then the Martians appear. They look like the stereotypical little green men but they don't want to invade earth, they just want to annoy mankind. Having Kwimmed (teleported) from Mars they can't touch anything physically or be physically touched themselves but they can see in the dark and can see through walls and take great delight in revealing all our secrets and generally causing irritation