How to Write a Simple Operating System in Assembly Language by Mike Saunders is a comprehensive guide that takes readers through the process of creating their own operating system from scratch using assembly language. The book is perfect for anyone interested in computer science, operating systems, or programming, and provides a detailed, step-by-step explanation of how to create a simple OS that can run on any x86-based computer.

The author starts the book by explaining the basics of assembly language programming, including the syntax, data types, and instructions used in this low-level programming language. He then moves on to discuss the different components of an operating system, such as the bootloader, kernel, and user-space applications, and how they interact with each other.

The book also covers important topics such as memory management, process scheduling, file systems, and input/output operations, which are essential for any operating system. The author provides clear explanations and examples for each of these topics, making it easy for readers to understand and follow along.

One of the unique features of this book is that it provides readers with a complete, working operating system that they can build themselves. The author provides all the necessary code and tools, and guides readers through the process of assembling and compiling their own operating system. This hands-on approach is incredibly valuable for anyone interested in learning how operating systems work, as it allows them to see firsthand how all the different components fit together.

Overall, How to Write a Simple Operating System in Assembly Language is an excellent resource for anyone interested in computer science, programming, or operating systems. The book is well-written, easy to read, and provides a wealth of information and practical advice for anyone looking to create their own OS. Whether you’re a student, a hobbyist, or a professional programmer, this book is a must-read for anyone interested in understanding the inner workings of operating systems.