From New York Times?best-selling author Mackenzi Lee, Gamora and Nebula: Sisters in Arms follows Gamora and her sister Nebula as they play a cat and mouse game with galactic consequences—and each other.

Gamora doesn't know who sent her to the planet Torndune. But as the reliable right-hand daughter of Thanos and one of the galaxy's most legendary warriors, her job isn’t to ask questions. What Gamora doesn't know is that her estranged sister, Nebula, has chased to Torndune, eager for revenge.
Soon the two sisters make unlikely alliances and find themselves in a twisted competition with galactic consequences. It's a game they're destined to lose—unless they learn to trust each other. But trust is the biggest lie in the galaxy ...