'Tourism’s Horizon: Travel for the Millions' provides a provocative, stimulating and challenging exploration of mass tourism in the context of growing global mobility, environmental challenges, and social shifts. It is a unique publication. In early 2023 the project and blog sharing this volume’s title, Tourism’s Horizon: Travel for the Millions (TH:TM), was established. TH:TM sought to question prevailing narratives around mass tourism, which often paid scant regard to the agency and humanity of tourists themselves. It also aimed to build a bridge between expert analysis and the wider public discussion of the issues, something often perceived to be lacking. Whilst contributors to this volume make diverse points from varied perspectives, they write on that shared basis. The book is divided into two parts: a collection of in-depth interviews with leading thinkers reflecting on the evolution and future of tourism related scholarship, and a series of thought-provoking essays and think pieces adapted from the Tourism’s Horizon blog. These pieces engage with urgent debates on sustainability, development, equality, and the ethics of travel, while also celebrating diverse and progressive aspects of mass leisure. This volume implicitly calls for a deeper, more reflective conversation about where we’re headed in the age of mass travel. TH:TM prompts that conversation, and invites you - whether student, scholar, worker in the industry, or simply curious traveller – to join in.