The real problem isn’t keeping inhumanoids out of America, it’s keeping Americans out of other countries. Because every time an American goes abroad, a monster hitches a ride on the return trip. “It had been impossible to foresee that Bradford’s search for the Snowman would terminate in this devastating spectacle,” writes Norman Bogner in his book’s prologue, obviously from the point of view of someone who does not understand that traveling to Tibet pretty much guarantees death for nine out of ten Americans.