The discovery early one Christmas morning of the bodies of best friends Jason Wyatt-Yarmouth and Ewan Williams, two privileged young men from Toronto, in an SUV sunken in an ice-covered river propels Delaney's stellar third mystery to feature constable Molly Smith of Trafalgar, B.C. (after Feb. 2009's Valley of the Lost
). Molly investigates what at first appears to be an accident, but when the times and manner of Jason's and Ewan's deaths turn out to differ, she and her colleagues have a murder case on their hands. Whether at the Glacier Chalet B&B, on a black diamond ski trail or in the police station, Delaney glides between scenes with ease. She uses a bare-bones style, without literary flash, to achieve artistry as sturdy and restrained as a Shaker chair. Warmth and menace, past and present, are nicely balanced, with a denouement that's equally plausible and startling. This confident performance is sure to win new fans to the series. (Nov.)