When Planets Fall - Abby J Reed

A bloodthirsty king. A wrecked starship ready for war.
A disabled mechanic is the planet's only hope.
Breaker's home is cleaved by blood. The three tribes on the planet Scarlatti, whose only difference is their blood color, each want to exploit Breaker's valley for themselves. The feudal tension has already claimed red-blood Breaker's leg and his older brother.

Now all this 18-year-old wants is to maintain the tenuous peace in order to keep his little 'stroid of a brother alive. Malani, a red-blood raised blue, is a kidnapped POW and only wants to return to her adoptive home with her dangerous blue secrets. Luka, a red-blood stewing for trouble, wants to right wrongs done to his family and bathe his home in justice.
All three intersect when Breaker discovers a wrecked starship and is given seven days by the green-bloods to fix and hand it over as a weapon. Breaker must decide if betraying the only home he knows is worth the secrets he discovers and his family's survival.
War is coming.
War respects no boundaries.
And war leaves no survivors.

When Planets Fall is the first of an epic and twisty science fantasy series with a found spaceship, complicated sibling relationships, and a sprinkling of star-crossed lovers.

"A propulsive, sharply crafted tale about a planetary war." from Kirkus Reviews

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