The book "Nitrosobenzene" by Betascript Publishing offers a comprehensive analysis of the organic compound nitrosobenzene, defined by the chemical formula C6H5NO. It is considered a hybrid between singlet oxygen and azobenzene and exists in a dynamic equilibrium with its dimer. The modern synthesis of nitrosobenzene occurs through the reduction of nitrobenzene to phenylhydroxylamine, followed by oxidation. The book also discusses various reactions involving nitrosobenzene, such as Diels-Alder reactions and condensation with anilines, which lead to the formation of azobenzene derivatives. The information is primarily sourced from articles available on Wikipedia and other free resources, providing a valuable overview of the chemical properties and reactions of nitrosobenzene.