UPDATE/Preface: The journal Existenz has published and made freely available online my essay Futurological Discourse and Posthuman Terrains, which now seems to me the best, most concise and yet elaborated introduction to my critique of transhumanism, and so I would preface the recommendations that follow with the suggestion that the Existenz article might also be a better starting point for some readers. The Existenz essay is rather densely philosophical in places, however, while many of the pieces that follow are more humorous or more readily digestable, and so I don't think that essay is a perfect substitute for the following by any means.