I am woefully ignorant of the field of techno-thrillers, so I defer to your knowledge. While I did read the book back in the mid-1990s, my memory now of the ca

I am woefully ignorant of the field of techno-thrillers, so I defer to your knowledge. While I did read the book back in the mid-1990s, my memory now of the caterpillar drive was the magnetohydrodynamic drive of the movie, which doesn't work like the movie suggested. Wikipedia tells me the book described "a pump-jet of the so-called "tunnel drive" type", so I fully withdraw my attempt at drawing a parallel.