The book “Quantum Mechanics and trajectories integrals” by Richard Feynman and Albert Hibs is not just a textbook on physics, but a real philosophical work that opens doors to the world of quantum mechanics, using a unique approach based on integrals along trajectories. Published in 1965, this book is still relevant and in demand among students, graduate students and anyone interested in the basics of quantum theory. Feynman, a Nobel laureate, is known for his unconventional thinking and ability to explain complex concepts in simple language. In this book, he and Hibs invite readers to look at quantum mechanics from a new perspective, viewing it as a system in which all the possible paths a particle can take matter. This is radically different from the traditional approach, which focuses on certain trajectories. This approach not only simplifies the understanding of quantum phenomena, but also opens up new horizons for research and applications. The book will be of interest not only to physics students, but also to everyone who seeks to understand how our world works at the most fundamental level. If you are passionate about science, philosophy or just want to expand your horizons, “Quantum mechanics and integrals on trajectories” will be a real discovery for you. This work is suitable for both young scientists and experienced researchers who want to deepen their knowledge in the field of quantum physics. The topics raised in the book cover a wide range of issues, from the foundations of quantum mechanics to more complex concepts such as interference and superposition states. Feynman and Hibs masterfully explain how path integrals can be used to describe the behavior of particles, making their approach particularly valuable for those who want to not just memorize formulas, but really understand physics at an intuitive level. The book also touches on the philosophical aspects of quantum mechanics, raising questions about the nature of reality and observation. Feynman's style is another reason to pay attention to this book. His ability to make complex things simple and accessible, as well as his fascinating and lively approach to explaining scientific concepts, make reading not only useful, but also enjoyable. It uses many examples and analogies, which allows the reader to easily assimilate the material and apply it in practice. If you are familiar with Feynman's other works, such as Feynman Lectures on Physics or Classical Mechanics, you will notice that his style remains unchanged: he always strives to make science accessible and interesting. The book “Quantum mechanics and integrals on trajectories” is not just a textbook, but a real find for everyone who wants to plunge into the world of quantum phenomena and understand their essence. In conclusion, “Quantum Mechanics and trajectories integrals” is a must-read for anyone interested in physics who wants to understand how the world works at the deepest level. This book will not only expand your knowledge, but will also make you think about the nature of reality, what is happening at the particle level, and how it affects our daily lives. Do not miss the opportunity to discover this fascinating world together with Feynman and Hibs!