Adrian Howells (1962-2014) was one of the world's leading figures in the field of one-to-one performance practice--the act of staging an event for one audience participant at a time. Developed over more than a decade, Howells's award-winning work demonstrated not only his enduring commitment to this genre of performance, but also his determination to find new challenges and innovations in performance art, "intimate theatre," and socially engaged art. It's All Allowed, edited by Deirdre Heddon and Dominic Johnson, is the first book devoted to Howells's remarkable achievements and legacy. Contributors here testify to the methodological, thematic, and historiographical challenges posed by Howells' performances. Citing his permissive mantra as its title, It's All Allowed includes new writing from leading scholars and artists, as well as writing by Howells himself, an extensive interview, scores, and visual materials, which together reveal new insight into Howells's groundbreaking process.