“Darkness for Light,” the third in Emma Viskic’s noir series featuring deaf private investigator Caleb Zelic on the meaner streets of Melbourne, launches like a greyhound and never lets up. Zelic, burdened by a history of wrong turns and now determined to live a quieter life, is instead thrust into a violent battle against unknown foes. Reunited with a former partner who portrayed him, the two race to save a young girl. Emma Viskic has a gift for evoking the highs and lows of inner Melbourne, can unfurl a twisty, dark plot, and writes urgent, sophisticated prose. Most importantly, Zelic is a wonderful hero, driven to do right and struggling to persist in the world of hearing humans. Definitely a series to follow and savor.