The Broken Third (Digitesque, #4) by Guerric Haché

Out between stars and planets that left Earth behind many centuries ago, Ada Liu discovers a thriving but strangely archaic interstellar civilization - a Union of ancient colonies that have survived a war of apocalyptic proportions. Expecting to uncover the roots of Earth's downfall, she instead finds this society built by strange humans and familiar aliens is threatening, bewildering, and not at all what she had hoped. Her abandonment of Isavel Valdéz haunts her as she travels further and further, but with an array of hunters breathing down her neck and no way to return, Ada needs to gather what little help she can and find refuge between the cold vacuum of space and the unfamiliar soils of new worlds. She has one unsettling advantage: for better or worse, Ada is a strange daughter of a stranger Earth, and is perhaps the second most dangerous thing this Union has ever faced.

New Adult • Science Fiction/Dystopian • Fantasy/Science Fantasy • Diversity Representation/LGBTQ+/Own Voices • Fantasy/Romantic and Erotic • Science Fiction/Exploration