A Guide to Active Filters by Johnson D. and others is an indispensable resource for anyone interested in electronics, especially in the design and application of active filters In this work, the authors have collected extensive experience and knowledge that will help both novice engineers and experienced professionals to better understand the principles of the operation of filters, their design and application in various fields. The book discusses the basic concepts of active filters, their types and characteristics. The authors share practical recommendations on the design of filters that can be used in a variety of applications - from audio engineering to radio communication. Readers will be able to learn how to choose the right components for creating filters, as well as how to optimize their work for the best results. Who can like this book? First of all, it will be of interest to students and graduate students of technical specialties studying electronics and radio engineering . It will also attract the attention of practicing engineers who want to update their knowledge or find new approaches to filter design. If you are fond of DIY projects or just want to understand the intricacies of working with active filters, this guide will be a real find for you The topics raised in the book cover a wide range of issues, such as signal theory, filter analysis and synthesis methods, as well as modern approaches to their implementation. The authors emphasize the importance of choosing the correct topology of filters and their parameters, which avoids common design errors. The book also includes many examples and practical problems, which makes it not only a theoretical, but also a practical tool. The style of Johnson and his colleagues is distinguished by clarity and accessibility. They skillfully explain complex concepts, making them understandable even for those who are just starting out in the world of electronics. This makes the book an excellent tutorial that can be used both as part of the educational process and for self-study. In addition, this guide will be useful to those who are already familiar with other works of authors, such as "Electronic filters: design and analysis" and "Basics of analog electronics" These books also offer deep immersion into the world of electronics and can serve as a great addition to the Active Filter Guide. If you’re looking for information about designing active filters, then you’re probably also interested in topics such as signal processing, analog circuits, audio filters, and radio frequency technologies. The book by Johnson and his colleagues will be your reliable assistant in these matters, providing not only theoretical knowledge, but also practical skills that can be applied in practice. In conclusion, the Guide to Active Filters is not just a book, but a whole world of knowledge that will open before you. Thanks to the available language and practical examples, you will be able not only to master the theory, but also to apply it in practice. If you want to become an expert in the field of active filters or just improve your skills in electronics, do not miss the opportunity to get acquainted with this wonderful work.