I received a free copy of this from the author.
The Prologue sets the scene for this SF novella (100 pages):
Fire raged across the molten surface of the increasingly volatile star. Flames rose incredible distances, breaking free as solar winds before light speeding their way through space.
For the small, airless ball of rock that was Mercury and the cloud covered furnace that was Venus it was little cause for concern. Even the inhabitants of Earth, with their twin shields of ozone and magnetism, had little reason to fear the storm.
Yet for Mars, the fourth planet in the system, and its last surviving colonists, it was a grave matter indeed
A means of saving the planet's colonists has been invented but the directors of the DAX corp, who own the mines, prefer to make good use of this opportunity to rid themselves of the rebellious colonists. After a series of murders on Earth, only Sana, the teenage daughter of the inventor of the device which could save the colonists, and Zac, a boy on his own with his dead father's battered old spaceship, can get the device to Mars in time. But Tanaka, the CEO of DAX sends a raijin, an indestructible cyborg, to overtake and kill them and prevent the device from ever getting to Mars.
It needs a bit of editing and there are probably too many switches of PoV for such a short read, but the story gets told and the excitement builds up. And I liked the two main characters –would like to see more of them, in a full length novel.