Textbook in PDF format This book explores integrated information spaces in the web context and beyond, with a focus on putting theories and principles into practice. The authors illustrate the heightened significance of Information Architecture (IA) and User Experience (UX) in industry and society. Building on foundational perspectives, the book explores advanced topics such as user research, the evolving role of Artificial Intelligence (AI), human information behaviors, and systems thinking. This Third Edition adopts a forward-looking approach to integrated web, social media, business tools, and more. Additionally, the book covers advancements in information technologies since the last release, including Generative AI and evolving IA/UX practices. The authors believe that the continuous evolution of the information spaces supported by the web, cloud, and Artificial Intelligence (AI) technologies makes it possible to deliver ever more sophisticated interactions and user activities. The increasing importance of large language models (LLMs) and Generative AI (GenAI) have had profound impacts on work, play, and society at large. UX and AI converge in human-centered AI (HCAI), with the responsibility to make AI work for people. This requires a team effort including data scientists, machine learning engineers, developers, product owners, graphic designers, user researchers, and many more