Is it possible that unusual creatures share the Pacific Northwest with its 10.3 million human occupants? It's true Oregon and Washington have "misplaced" alien invaders, such as a half-inch flea, a giant spider with a leg span of three inches, and a snakehead fish (made famous of late in four horror movies) that can breathe in water and on land, and grows to be about four feet long. There are sea monsters, from prehistoric times to the present, as...