Armchair Fiction presents extra large editions of classic science fiction double novels. The first novel is Paul W. Fairman's "Secret of the Martians." Were Martians really dangerous? No human being on Earth or Mars seemed to think so. Very few of the human colonists had ever even seen a Martian. Indeed, the Martians had essentially given way to Terran colonists centuries before and allowed them to have all the equatorial regions of the planet for...