An empire in crisis. Four young leaders. The only way forward is through the numbers.When the vast Inca Empire (Tawantinsuyu) faces a season of unprecedented struggle, the Sapa Inca calls upon four young delegates from the four corners of the realm. Aanya, Noah, Imani, and Evan must step up to manage vital resources, repair crumbling infrastructure, and negotiate fair trade without using money.But this isn't just historical fiction; it is a high-stakes simulation. The delegates quickly discover that gut feelings and loud arguments won't feed the population or keep the bridges safe. The only way to lead ethically and ensure justice is to master mathematics as a tool for leadership.Designed for middle school students (Grades 6-8), Council of the Four Suyus seamlessly blends a gripping historical narrative with real-world math challenges. As the story unfolds, readers don't just watch the characters solve problems-they participate by calculating percentages, weighted averages, unit rates, and analyzing data alongside the council.Featuring the unique "Three Knots" framework for managing stress and decision-making, this book transforms math from an abstract chore into a vital tool for dignity and fairness. Can the council put aside their differences and calculate a path to survival before time runs out?