Forbidden Names — Robert E. Vardeman

Some jobs are too awful to contemplate-one of them is driver for a cross-dimensional truck carrying contraband cargo.

It's lonely, desperately lonely on the deserted road, and he knew better . . . but he had to pick up the beautiful, frightened hitchhiker. Chased across every SU11 dimension by unspeakable things, carrying a cargo on a deadly timetable, driver and rider face more than danger when they find FORBIDDEN NAMES.