The prices of the food that reaches our table aren't just set in the supermarket. Behind every packet of rice, liter of milk or loaf of French bread, there is a complex network of relationships between the countryside and the city, influenced by the prices of agricultural commodities.This book reveals how variations in the prices of products such as soy, corn, cotton and beef directly affect the cost of food and, consequently, the population's food security. In an accessible way and based on rigorous research, the book analyzes the dynamics of prices, the transmission of volatility between markets and the risks involved in this process.More than numbers and graphs, what is at stake here is the impact of these fluctuations on the lives of families, especially those on lower incomes. Essential reading for researchers, agribusiness professionals, public policy makers and anyone seeking to understand how Brazil, the world's largest breadbasket, can guarantee food on the table for its population in a scenario of constant uncertainty.