Zero Sum Game

Zero Sum Game, by SL Huang, is the first book in the series. It introduces Cas, Rio, Arthur, Checker, and Dawna, along with Anton, Penny, Leena Kingsley, Reginald Kingsley, Steve, and Courtney Polk. This is the beginning of the Pithica story arc. It was republished under Tor with some edits in October 2018.