Shrunken

Publisher's blurb: The World is a big place, literally. Was it mad science, a magic spell, or alien technology? Someone or something has shrunken you to 6 inches tall and means to keep you that way. Yesterday you had a world of ordinary problems. Today the World is your problem. How did you get this way? How do you get out of here? Can you get back to normal? How big is that spider?