The book "Dislocations and their influence on the mechanical properties of solids" by the authors of N. P. Yurkevich and S. and . Petrenko is an in-depth and comprehensive study devoted to one of the key topics in the field of materials science and mechanics. This edition will be of particular interest to both students and professionals working in the fields of solid state physics, metallurgy and engineering. The authors, having considerable experience and scientific achievements, immerse the reader in the world of dislocations - defects of the crystal lattice, which play a decisive role in determining the mechanical properties of materials. The book begins with the basics of dislocation theory, explaining what dislocations are, how they form, and how they affect the behavior of solids under load. This