Reynolds, Allie

The denouement of the locked-room mystery, which is a little disappointing, comes out of left field. Libraries may want to order on request, but it isn’t a crucial purchase.

The story alternates between the present and 10 years prior, ratcheting up the suspense and spooling out a cast of intriguing characters drawn together atop a picturesque yet deadly mountain. Reynolds, a former international snowboarder, delivers the thrills in her must-read debut.