Zero Sum Game: action-packed sf thriller about a ninja hero whose superpower is her incredible math ability

SL Huang got a degree in math from MIT, then became a martial artist, stuntwoman and weapons expert; her debut novel, Zero Sum Game, features an ass-kicking action hero called Cas Russell, who combines all of Huang's areas of expertise: Russell is a ninja-grade assassination/extraction contractor whose incredible math skills let her calculate the precise angles needed to shoot the bolts out of an armored window as she leaps towards it from an adjacent roof; to time a kick so that it breaks her opponent's jaw without breaking his neck, or to trace back the path of a sniper's bullet with eerie accuracy and return fire. Read the rest