This was the first book by Ruth Ware I read, and I'll certainly be back for more. The reveal of the killer's identity is delayed as long as possible (there are clues along the way, but none are absolutely conclusive to keep you guessing for a while), and the setting in the isolated chalet in the ice-cold Alps adds a chilling effect in every sense of the word. One thing that bugged me a bit is the lack of unique character voices. The story is told in first person and alternates between the POVs of two characters (the name of the POV character is given at the beginning of each chapter). Both of them are young women, and they sound exactly the same. For example, the author's little linguistic tic of using a double "very" (as in "this is very, very bad" or "the person is very, very dead") pops up in the dialog of both characters. If only one spoke like that, it would be a nice way to distinguish that voice from all the others. But since it's used for both POV characters, at some point I had to flip back to the beginning of the chapter to double-check whose POV it currently was. In addition, some distinctive expressions like "mate" and "oi" as well as the usual swear words are used by multiple supporting characters in similar ways, thus making it more difficult to keep track of who's saying what and when and where – which isn't ideal in a murder mystery. This flaw aside, it was a fun read.