Book cover: Killing Gravity - Corey J White (a person in a spacesuit in a balletic pose with a planet in the background)Mariam Xi – Mars – is on the run from a military research unit. Gifted with extraordinary psychic powers and trusting only a tiny, genetically-engineered creature who likes to sleep in her spacesuit, her instinct is to go it alone. But even a voidwitch needs allies if she’s to discover who – and what – she really is, and just what she can become…