One comment concerning the concept of a weak Nietzschean transhumanism: The concept "weak" has two meanings in this context. It refers to Sorgner stressing procreative autonomy rather than procreative beneficence, but also to his being indebted to Vattimo's approach of the pensiero debole. The Nietzschean aspect refers to his approach being based upon a permanent and long-time engagement with Nietzsche’s philosophy (see also the new book in French forthcoming in October entitled "Why I am a Nietzschean" wherein Sorgner explains this aspect further). Finally, Sorgner affirms the core element of transhumanist thinking which implies that he is affirming the use of technologies to break the boundaries of who we currently are as individual human beings.

For those who cannot read German, the following introduction to both Post- as well as Transhumanism which is available in English might be a good alternative. 

Furthermore, a collection, edited by Yunus Tuncel, will be out soon which includes central articles of the Nietzsche and transhumanism debate with responses from Sorgner. It will get published in the following book series.