A few weeks back the "Museum of Outdated & Neglected Dictionaries & Encyclopaedias" welcomed its newest arrival, the "Enzyklopädie Philosophie und Wissenschaftstheorie" (4 vols, 1980-1996, in German). It's an encyclopaedia that treats its topics from a constructivist point of view. A wonderful set of books, I'm happy to finally have it here.