Librería Samer Atenea
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Karl Popper described Die Beiden Grundrpobleme der Erkenntnistheorie - The Two Fundamental Problems of Knowledge - as ' above all about... the crisis of physics. It asserts the permanence of crisis; if it is right, then crisis is the normal state of a highly developed rational science.' Finally available in English for the first time, it is a major contribution to Twentieth century philosophy.