As a philosopher and a novelist, Tristan Garcia inhabits two worlds, metaphysics and literary fiction, like an amphibious creature moving between the land and the sea, breathing in both air and water. He is drawn to metaphysics because, as he puts it, metaphysics is the edge of the abyss of thought, the unstable frontier of indeterminacy where thinking is no longer constrained by the principles of logic or the law of non-contradiction. Metaphysics seeks to describe the world from outside one's own point of view. It aims at an ecstatic reconstruction of what keeps us locked up in our conditions, in our time and place, here among the living, with our subjectivities and within our situations. It gives us an idea of all constraints from a point of view that posits the possible absence of the constraint of having a point of view. The ambition of this slender book - which is at the same time a concise introduction to Garcia's work and thought - is to help us grasp and transform the conditions of our existence by paying equal attention to what is ending and what is just beginning, to the dusk and to the dawn. Until we cannot hold our breath any longer.