The standard academic reference for transport geography, covering the physical, economic, and spatial dimensions of freight and passenger mobility across all modes; maritime, rail, road, and air. The fifth edition provides the conceptual and quantitative framework for understanding how transport systems create and distribute economic value, including the cost structures and modal economics that govern logistics decision-making. The aggregated logistics cost data cited in this blog (roughly 75% trucking, 15% maritime, 5% air, 5% rail) comes from this text, and the broader framework is essential for anyone modelling transport cost structures across modes and distances.