Simon Kewin 
Dead Star — The Triple Stars Volume 1 [EPUB ebook] 

A hidden trail among the stars
The galaxy is in flames under the harsh theocratic rule of Concordance, the culture that once thrived among the stars reduced to scattered fragments. Selene Ada, last survivor of an obliterated planet, joins forces with the mysterious renegade, Ondo Lagan.
Together they attempt to unravel the mystery of Concordance’s rapid rise to galactic domination. They follow a trail of shattered starship hulks and ancient alien ruins, with the ships of the enemy always one step behind.
But it’s only when they find the mythical planet of Coronade that they uncover the true scale of the destruction Concordance is capable of unleashing…