The book "Similarity and Dimensional Methods in Mechanics" by L. I. Sedov, translated from Russian, focuses on developing a systematic method for studying nonlinear problems in one-dimensional unsteady fluid motion, including radiative and gravitational effects. The author and his students have built this method based on dimensional analysis, emphasizing the role of independent physical constants. The book covers the general concepts of dimensional analysis, elementary applications, and the application of dimensional reasoning to solutions of the Navier-Stokes equations and turbulence theory. The main chapter discusses self-similar solutions for one-dimensional unsteady gas motion, providing detailed examples and integrals. The final chapter applies dimensional reasoning to astrophysical problems. The book is valuable for applied mathematicians and engineers, offering a practical approach with numerous examples and a focus on physical ideas. However, it does not cover some advanced topics like piston problems and hypersonic flow. "Introduction à l'Étude de la Rheologie" is an excellent introduction to rheology, edited by B. Persoz and contributed by various experts. Part I provides a theoretical background, while Part II is more of a handbook, covering the rheology of various materials such as metals, polymers, and soils. The book includes problems at the end of each chapter and a trilingual table of rheological terms. It fills a gap between M. Reiner's "Twelve Lectures on Theoretical Rheology" and F. R. Eirich's three-volume "Rheology," making it a valuable resource for students and researchers in rheology. "Direct Conversion of Heat to Electricity" edited by Joseph Kaye and J. A. Welsh, is a collection of lectures from a summer school at MIT. The book covers a wide range of topics in direct heat-to-electricity conversion, including thermionic engines, magnetogasodynamic converters, thermoelectric effects, and fuel cells. While the content is varied and some parts are challenging, it serves as a comprehensive resource for those interested in this rapidly developing field. The book highlights the need for engineers and scientists who are well-versed in multiple disciplines to address the complexities of direct heat-to-electricity conversion.The book "Similarity and Dimensional Methods in Mechanics" by L. I. Sedov, translated from Russian, focuses on developing a systematic method for studying nonlinear problems in one-dimensional unsteady fluid motion, including radiative and gravitational effects. The author and his students have built this method based on dimensional analysis, emphasizing the role of independent physical constants. The book covers the general concepts of dimensional analysis, elementary applications, and the application of dimensional reasoning to solutions of the Navier-Stokes equations and turbulence theory. The main chapter discusses self-similar solutions for one-dimensional unsteady gas motion, providing detailed examples and integrals. The final chapter applies dimensional reasoning to astrophysical problems. The book is valuable for applied mathematicians and engineers, offering a practical approach with numerous examples and a focus on physical ideas. However, it does not cover some advanced topics like piston problems and hypersonic flow. "Introduction à l'Étude de la Rheologie" is an excellent introduction to rheology, edited by B. Persoz and contributed by various experts. Part I provides a theoretical background, while Part II is more of a handbook, covering the rheology of various materials such as metals, polymers, and soils. The book includes problems at the end of each chapter and a trilingual table of rheological terms. It fills a gap between M. Reiner's "Twelve Lectures on Theoretical Rheology" and F. R. Eirich's three-volume "Rheology," making it a valuable resource for students and researchers in rheology. "Direct Conversion of Heat to Electricity" edited by Joseph Kaye and J. A. Welsh, is a collection of lectures from a summer school at MIT. The book covers a wide range of topics in direct heat-to-electricity conversion, including thermionic engines, magnetogasodynamic converters, thermoelectric effects, and fuel cells. While the content is varied and some parts are challenging, it serves as a comprehensive resource for those interested in this rapidly developing field. The book highlights the need for engineers and scientists who are well-versed in multiple disciplines to address the complexities of direct heat-to-electricity conversion.