In this concise book, we explore the fascinating world of Quantum Electrodynamic (QED), one of the most successful theories in modern physics. QED describes the interaction between light and matter at the most fundamental level, incorporating both quantum mechanics and electromagnetism. Despite its profound complexity, we aim to present QED in a nutshell, making it accessible to readers with a basic understanding of physics.
 
Through the course of ten chapters, we cover the foundational principles of quantum mechanics and electromagnetism, highlighting the essential mathematical framework required to comprehend QED. We delve into the concept of quantized fields and the fundamental role they play in describing the behavior of particles and interactions.