A paperback edition of Jürgen Habermas's "Auch eine Geschichte der Philosophie" is now available. It features a new "Afterword" by Habermas - "Nachwort zur Taschenbuchausgabe", vol. 2, pp. 811-833. See further information at my blog.
The new edition of Habermas's book is also published in a "deluxe" hardback edition for members of the German book club "wbg" (Wissenschaftliche Buchgemeinschaft).