“Ten Little Guppies” by Scott Douglas is an exhilarating and engaging read that masterfully integrates mystery with the lively backdrop of a winter train ride from Quebec City to Montreal. The tale features ten ambitious people from Silicon Valley, poised on the brink of becoming billionaires, but their journey takes a dark turn as murder looms among them. Douglas skillfully captures the enthusiasm and tension, creating a story that keeps readers engaged until the conclusion.