Here are some books that are free on Google Play by Aaron Hodges, Patty Jansen, Athena Grayson, and Aurora Springer.
The Genome Project
by Aaron Hodges
Beside her, eighteen-year-old Chris stands wrongfully accused of treason. The two are now volunteers in the Genome Project – an experimental program to enhance the human race. Stripped of their rights, they will soon learn the true depths of human cruelty. The two must work together to survive, but even then, their chances are slim. Of course, only the lucky get to die.
Ambassador 1: Seeing Red
by Patty Jansen
Young diplomat Cory Wilson narrowly escapes death in the assassination of President Sirkonen. No one claims responsibility but there is no doubt that the attack is extraterrestrial.
Cory was meant to start work as a representative to Gamra, the alien organisation that governs the FTL transport network, but now his new job may well be scrapped in anger.
Worse, as Earth uses military force to stop any extraterrestrials coming or leaving, as 200,000 extraterrestrial humans are trapped on Earth, as the largest army in the galaxy prepares to free them by force, only Cory has the experience, language skills and contacts to solve the crime.
But he’s broke, out of a job and a long way from Earth.
The Chase: Huntress of the Star Empire #1
by Athena Grayson
Psypaths like Micah became scapegoats for inexplicable devastation…and then rebels against the repressive, reactionary Union. Micah has one last chance to strike at the heart of the Union that hunted his kind to near-extinction–the Huntress ready to deliver him to its deepest prison. The secrets locked in Treska’s missing memories can bring down the Union–if he can get out of her handcuffs and into her mind.
by Aurora Springer
Dr. Nikki Bell’s plan to discover intelligent life on Jupiter’s moon hits a rocky start when her spaceship crashes on the icy surface of Europa. Seconds before she blacks out, she spies a man’s face in the water beneath the ice. Her unexpected sighting of the alien, Kiron Arqin Ramis, triggers a chain of disasters in Europa’s perilous oceans. Can the daredevil scientist and abused Watcher forge a new alliance despite their people’s antagonism?