An extensive biography of Jürgen Habermas will be published by Suhrkamp Verlag for his 85th birthday on June 18, 2014. The biography - "Jürgen Habermas: Eine Biographie" - is written by Stefan Müller-Doohm, Professor Emeritus at Oldenburg University, who in 2003 published a biography of Theodor Adorno.
See the table of content and the preface here [pdf] Updated
See the book cover here [pdf]
And a preview here.
An English translation will be published by Polity Press.