The work of the Royal Canadian Mounted Police, one of the most dedicated law enforcement bodies in the world, is dramatized in a low pitched taut account of the adventure of one of its most able members. Peter Thorne and his trusted husky, Silver Chief, follow the bloody trail of a brutal killer across Canada by air, by sea and finally by dog sied through the northernmost regions of the Arctic Circle. Silver Chief's skill as a hunter and a top notch leader of a dog team plays a vital role in the hair-raising capture of the fugitive. An aura of authenticity pervades the story as the specific methods employed by the R. C. M. P are explained and the geographical situation is clearly described. A better than adequate addition to a somewhat uneven series.