"Sulfur Nutrition and Tomato Plant Resistance against Botrytis cinerea" is a specialized book that addresses the susceptibility of tomato plants (Solanum lycopersicum) to the economically significant fungus Botrytis cinerea. This disease poses a significant threat to commercial tomato cultivation, especially in temperate and subtropical regions. The book explores the genetic plasticity of B. cinerea and the challenges associated with controlling this disease. It highlights that partial resistances have been identified in wild relatives of the tomato, such as Solanum habrochaites. The development of introgression lines (ILs) is discussed as a means of utilizing these genetic resources to enhance resistance to B. cinerea. A central aspect of the book is the role of sulfur in the formation of defense compounds that can increase the resistance of tomato plants to this disease. The findings are particularly valuable for professionals and enthusiasts who wish to understand the relationships between nutrients and disease resistance in plants.