Web engineering focuses on the techniques, tools and methodologies related to web application development. It also deals with their development, design, evolution and evaluation. Web engineering is a multidisciplinary field that encompasses various areas including software engineering, hypertext engineering, human computer interaction, user interface, information engineering, modeling and simulation, and project management. It utilizes the principles of software engineering. It includes new tools, methodologies, approaches and guidelines in order to meet the unique requirements of web-based applications. Some of the different types of applications where it is used are semantic web applications, workflow-based web applications, collaborative web applications, transactional web applications, interactive web applications and portal-oriented web applications. This book presents the complex subject of web engineering in the most comprehensible and easy to understand language. There has been rapid progress in this field and its applications are finding their way across multiple industries. This book will provide comprehensive knowledge to the readers.