The Universe Between Author:Alan E. Nourse Bob Benedict is one of the few scientists able to make contact with the invisible, dangerous world of The Thresholders and return - sane! For years he has tried to transport - and receive - matter by transmitting it through the mysterious parallel Threshold. At first his efforts met only with failure and madness. But now The Thresholders have... more » risen in fury. Somehow Bob Benedict must make one more trip into that land of peril and pacify them before the succeed in hurling his planet - piece by piece - into the oblivion of infinity.« less