The book "Visualization of Conventional and Combusting Subsonic Jet Instabilities" offers a comprehensive analysis of the latest findings on the instabilities and dynamics of subsonic jets, particularly in the context of microjet combustion. It addresses the interactions between flows and acoustic fields and highlights the differences between various jet instabilities. The authors, Yury A. Litvinenko, Genrich R. Grek, and Victor V. Kozlov, present both theoretical and practical aspects of hydrodynamics and combustion, supported by current experimental data. Readers will gain a clear overview of the development of flows under different conditions and the effects of environmental influences on jet dynamics. This specialized book is aimed at students of fluid mechanics as well as researchers focusing on the specific aspects of instability and transition in flows.