The book "Fretes e Frotas: Redução de Custos no Transporte Rodoviário de Cargas" by Amir Mattar Valente offers a comprehensive analysis and innovative approaches to cost reduction in the field of road freight transport. The author presents the results of his research, in which he has developed a model based on various algorithms. This model aims to enhance efficiency in fleet planning and freight service delivery. It includes four essential components that together enable informed decision-making and improve the economics of transportation. By applying advanced techniques for route optimization and cost minimization, it promotes sustainable and effective use of transport resources. The book is aimed at professionals and students engaged in logistics, transport management, and business administration.