A comprehensive guide for developers who want to build Generative AI applications. The text explains the foundations of Generative AI and introduces AWS Bedrock as a cloud-based platform designed for building these applications. The book outlines how to choose the right Foundational Models, fine-tune them with Low-Rank Adaptation (LoRA) for specific tasks, and write effective prompts to guide the models' output. The book also explores key aspects of building a Generative AI application, such as user interface design, integration with other AWS services, and security considerations. Finally, it discusses responsible AI practices, cost management, and various real-world applications of Generative AI across different industries.