Everything you need to understand or teach One by One by Ruth Ware.
In the murder mystery One by One by Ruth Ware, employees of the music app Snoop are being killed off one by one during a ski retreat to discuss a buyout offer. Are the murders business-related? Is there something more sinister at play? Themes in the novel include morality in the workplace, the impact of loss and grief, and interactions between the working class and the privileged.