Fictioning in art is an open-ended, experimental practice that involves performing, diagramming or assembling to create or anticipate new modes of existence. In this extensively illustrated book containing over 80 diagrams and images of artworks, David Burrows and Simon O'Sullivan explore the technics of fictioning through three focal points: mythopoesis, myth-science and mythotechnesis. These relate to three specific modes of fictioning: performance fictioning, science fictioning and machine fictioning. In this way, Burrows and O'Sullivan explore how fictioning can offer us alternatives to the dominant fictions that construct our reality in an age of `post-truth' and `perception management'. Through fictioning, they look forward to the new kinds of human, part-human and non-human bodies and societies to come.