You might also check out the writings of Fred Alan Wolf and Richard Feynman.
I recently read "Parallel Universes" by Wolf. In it, there are some easy-to-understand illustrations of the concepts of spinning black holes and event horizons, and the like.
What much of this magnetic field research has to do with is accelerating to the speed of light in order to access other worlds. It's kind of a pragmatic way of doing things that are already possible at the subatomic level.
Everybody sing now: "My heroes have always been theoretical physicists..."
