Hal K Wells: 17 books

Benjamin Marlowe and his young assistant, Larry Powell, opened the door of the Marlowe laboratory, then stopped aghast at the sight which greeted their startled eyes. There on the central floor-plate directly in the focus of the big atomic projector stood the slender figure of Joan Marlowe, old Benjamin...

Facing a six-hour deadline of death, young Larry raids a hostile world of rat-men and tinkling Devil Crystals. Oh no! Rat men and crystals...almost laughable, but very readable tale of deadlines, rat-alien things, and crystals. The world will never be the same.