Corey J. White’s space opera Voidwitch Series continues: Mars Xi returns in Void Black Shadow, sequel to Getting rid of Gravity. Mars Xi is a living weapon, a genetically-manipulated psychic supersoldier using a body count number in the hundreds, and all she desired was to be left alone. People who try her get harm, whether by MEPHISTO, by her psychic backlash, or by her acidity tongue. It isn’t smart to get involved with Mars, but that doesn’t stop some individuals from trying. The last time MEPHISTO emerged for Mars they had taken one of her friends with them. That was a blunder. A force hasn’t been invented that may end a voidwitch on the rampage, and Mars won’t rest until she’s resolved her debts.