A Textbook of Tourism [Subject Code 806] for Class 12 is designed to facilitate the job role of Travel Blogger, Airline Staff, Hotelier, Tourism Manager, Travel Consultant, Front Office Executive, Travel Executive, Tourist Guide, Transport Agent and Tour Operator. This book has been developed as per the latest syllabus and examination pattern prescribed by the CBSE with the planned instructions consisting of units for developing employability and skills competencies among students. The language in the book is deliberately kept reader-friendly, allowing easy accessibility and grasp of knowledge. In the contemporary era, the predominance of the internet and advanced technology have increased the operational value of tour operators and travel agencies. Increased domestic and international visits to India led to an increased dependence on travel intermediaries. Also, the lower investment and attractive returns enticed many people to start their own travel agencies. The book provides a comprehensive view of travel agencies' and tour operators' businesses in the tourism sector. Each topic is discussed and supported by examples to provide students with a better understanding. The book proposes to provide both practical and theoretical knowledge about the tourism industly. It also imparts basic knowledge of contemporary topics like online travel agencies, e-visa, the significance of travel insurance in the post-COVID-19 phase and entrepreneurship in the tourism trade. This book aims to impart knowledge about the travel intermediaries' significance, operating mechanisms, and activities. The wide array of activities carried out by travel agents and tour operators covers itinerary planning, package design, helping travellers choose a destination, costing the package, marketing the product, operating the booking software (GDS), and so on. This book will help students learn about the significance of travel intermediaries in facilitating travellers in different ways throughout their vacations. Each chapter has been divided into the following parts: (a) lntrodudion: It introduces you to the unit's topic and learning objectives. (b) Relevant Knowledge: This part of the unit provides you with the relevant information on the topics covered. The knowledge developed through this part will enable the students to perform certain activities listed at the end of each topic. (c) Assignment: The various questions included in this part will help the students to check their understanding of the topics learned. Sincere attempts have been made to keep the language of the book simple. The concepts have also been explained through pictorial illustrations wherever necessary. This will allow the students to have a swift reading of the book, making the content of the book easy to understand. We also hope that this book will boost the students' morale and enormously benefit the teachers. Constructive suggestions for the improvement of the book are most welcome. The authors would be glad to read the feedback and implement it in upcoming books. -Authors