The field of education is undergoing a transformative shift with the integration of emerging technologies. Augmented Reality (AR) has opened new frontiers for interactive learning, enabling students and educators to engage with content in ways previously unimaginable. This book, Arcademy: An Augmented Reality Based Encyclopedia, serves as a comprehensive guide to leveraging AR for educational purposes. It combines theoretical insights with practical applications, making learning more immersive and engaging. Each page is enriched with augmented content that can be accessed through the Arcademy app, allowing readers to visualize and interact with complex concepts effortlessly. Designed for students, educators, and technology enthusiasts, this book covers diverse topics, including astronomy, human anatomy, paleontology, and engineering concepts, all enhanced with AR. My goal is to bridge the gap between traditional learning and modern technological advancements, providing a resource that fosters curiosity and deeper understanding. I sincerely hope that Arcademy inspires readers to explore, learn, and innovate, making the most of what augmented reality has to offer in the realm of education.