This introduction sets out the background to Posthuman Buddhism and the development of ideas that have fed into the book's four main chapters. It highlights the significance of the concept of ‘spaciousness’ to the different strands of enquiry that are explored throughout the book. This dovetails with a brief reflection on the coronavirus pandemic and the psycho-spatial experiences of lockdown this brought in its wake; circumstances that could not have been anticipated when the book was still in its planning stages in 2019. The chapter goes on to explain how Posthuman Buddhism is, in part, the outcome of ‘teaching-led research’ on account of content that was developed as part of an undergraduate module taught at the University of Liverpool, Media, Self and Society, that provided an incubatory space for the ideas explored in the book. In the final part of the introduction, short descriptions of each of the main chapters are provided.