This new book by M. Levinshtein and G. Simin tells the readers about the design and work of the most important and interesting semiconductor devices - the transistors. The book is written in a friendly and easy to read manner and is meant primarily for young people, high school students, freshmen and sophomores. However, the original approach to semiconductor physics makes this book attractive to physics teachers and professors as well. The book consists of 3 parts: Part I: the section on semiconductors describes the main properties of semiconductors, explains the difference between the...