In a family house beside a loch in Argyll, Scotland, just northwest of Glasglow, Andreina Cordani holds up the hard copy of her latest novel, The 12 Days of Murder. The cover looks like it’s wrapped as a Christmas present, with red and gold baubles framing the title, and the ‘M’ of Murder dripping down the page. The novel centers around a university reunion in a Scottish glen where seven members of the school’s murder mystery society come together to solve one final puzzle. Unsurprisingly, the gathering takes a dark…