In this episode of SF Crossing the Gulf, we tackle Napier’s Bones by Derryl Murphy. Murphy introduces some fascinating ideas, but undercuts them with info-dumping and a muddled ending. Dom has the ability to see and control numbers. After running from a desert confrontation between two other numerates, he ends up in a small Utah town with an adjunct spirit called Billy riding along in his head. Along with a raw numerate named Jenna, Dom and Billy head north while avoiding their foes. The magic system itself is fascinating, if dubious at times, but the lengthy explanations often slow the story down. The final 50 pages then turn into a race to cram too much action into a sloppy and chaotic ending. Murphy’s nifty ideas might be enough to sustain the plot for some readers, but few will come away wholly satisfied. –Publisher’s Weekly Math-Fi and Magic and History and Myth, all wrapped up in a fun (possibly urban fantasy-style) adventure!