Marvel Guardians of the Galaxy: Gamora & Nebula Sisters in Arms by Mackenzi Lee

Since being adopted by Thanos, Gamora and Nebula have always grappled with who their father has pushed them to be versus who they want to be, all the while struggling to be sisters rather than enemies.

When the pair end up on a deteriorating planet being mined for its valuable resources, a series of events force the sisters to confront the source of their rivalry - and where their loyalty truly lies.