Mastering MQTT for IoT: A Practical, Project-Based Course, authored by Vikram Singh Sankhala, is designed to equip developers, embedded systems engineers, and automation professionals with the essential skills to design, implement, and deploy robust real-time device communication. The book guides learners through the MQTT protocol, a lightweight and scalable messaging solution crucial for the Internet of Things (IoT). Starting with foundational concepts like the publish/subscribe model and broker/client architecture, the course progresses to practical application, including setting up local brokers with Mosquitto or EMQX, and programming MQTT clients in Python using libraries like Paho. Readers will gain hands-on experience with topics, Quality of Service (QoS) levels, message persistence, and session management, ensuring reliable data exchange even in challenging network conditions. The core of the book is its project-based approach, culminating in the development of a real-world IoT use case: a networked temperature monitoring system. This project involves building sensor clients with Raspberry Pi to publish readings and developing a control center application to subscribe, display data, and trigger alerts. Advanced modules cover securing MQTT communication with TLS and authentication, deploying to cloud platforms like HiveMQ Cloud for scalability, and troubleshooting common issues. The ultimate goal is to empower readers to move from theoretical understanding to practical deployment, enabling them to build efficient, secure, and scalable IoT solutions for diverse automation environments, thereby transforming their knowledge into tangible, project-ready implementations.