For a limited time, you can download Elizabeth Moon's Remnant Population for only 1.99$ here.
Here's the blurb:
For forty years, Colony 3245.12 has been Ofelia’s home. On this planet far away in space and time from the world of her youth, she has lived and loved, weathered the death of her husband, raised her one surviving child, lovingly tended her garden, and grown placidly old. And it is here that she fully expects to finish out her days–until the shifting corporate fortunes of the Sims Bancorp Company dictates that Colony 3245.12 is to be disbanded, its residents shipped off, deep in cryo-sleep, to somewhere new and strange and not of their choosing. But while her fellow colonists grudgingly anticipate a difficult readjustment on some distant world, Ofelia savors the promise of a golden opportunity. Not starting over in the hurly-burly of a new community . . . but closing out her life in blissful solitude, in the place she has no intention of leaving. A population of one. With everything she needs to sustain her, and her independent spirit to buoy her, Ofelia actually does start life over–for the first time on her own terms: free of the demands, the judgments, and the petty tyrannies of others. But when a reconnaissance ship returns to her idyllic domain, and its crew is mysteriously slaughtered, Ofelia realizes she is not the sole inhabitant of her paradise after all. And, when the inevitable time of first contact finally arrives, she will find her life changed yet again–in ways she could never have imagined. . .
You can also get your hands on Rajan Khanna's Falling Sky for only 2.51$ here.
Here's the blurb:
Ben Gold lives in dangerous times. Two generations ago, a virulent disease turned the population of most of North America into little more than beasts called Ferals. Some of those who survived took to the air, scratching out a living on airships and dirigibles soaring over the dangerous ground. Ben, a lone wolf, has reluctantly agreed to use his skills and his airship to help an idealist scientist, Miranda, on her search for a cure. Protecting her from Ferals is dangerous enough but when power-mad raiders run rampant, Ben finds himself in the most dangerous place of all—the ground. Ben’s journey leads him to Gastown, a city in the air recently conquered by belligerent and expansionist pirates. Old friends and new enemies are drawn into a struggle that quickly becomes a fight for the fate of the world. Ben must decide to focus on his own survival or risk it all on a desperate chance for a better future.