All Popper´s published books as well as all the books that constituted his library have entries in the Online Catalogue of the Klagenfurt University Library. By use of the search term "Popper-Sammlung" all titles can be retrieved and identified as part of this special collection. Individual features such as handwritten notes, dedications or inserts are noted in the catalogue entries.

The collection of Popper´s published writings contains approximately 650 volumes: all the imprints, editions and translations of the philosopher´s books; Among them are his Master Copies, marked with "MC" and in many cases inscribed with his personal comments. These annotations, sometimes on pieces of paper that are glued in, contain corrections and variations, additions and commentaries, and some of the copies contain extended preparatory notes for the next panned edition. Together these notes document the detailed development of Popper´s writing: Any idea that was published once in a certain context never proved to be final, and it remained open for ever to reconsideration.

The vast spectrum of  Popper´s ideas is demonstrated by the List of Publications (maintained by Melitta Mew) and the  International Karl Popper Bibliography 1925 - 2012 (compiled by Manfred Lube). The latter lists a large number of publications on Popper, on his ideas and on his writings.

The books written by Karl Popper and their translations are shelved title be title in chronological order:

• 1.0 Collected Works
• 1.1 The Logic of Scientific Discovery
• 1.2 The Open Society and its Enemies
• 1.3 The Poverty of Historicism

• 1.4 Conjectures and Refutations

• 1.5 Objective Knowledge
• 1.6 Unended Quest: An Intellectual Autobiography
• 1.7 The Self and its Brain
• 1.8 Die beiden Grundpobleme der Erkenntnistheorie
• 1.9 From the Postscript to the Logic of Scientific Discovery
  • Realism and the Aim of Science
  • The Open Universe: An Argument for Indeterminism
  • Quantum Theory and the Schism in Physics
• 1.10 Offene Gesellschaft - Offenes Universum
• 1.11 Alles Leben ist Problemlösen: Über Erkenntnis, Geschichte und Politik
• 1.12 Various texts
• 1.13 Popper´s contributions to books and journals
• 1.14 Popper as subject of writings by others
• 1.15 Offprints of Popper´s articles

Popper´s Library

The so-called working library comprises approximately 7.500 volumes, several hundred issues of journals and a vast collection of offprints of writings of others. The library contains many copies inscribed to Popper, and what remains of the library of Popper´s father. The classes under which the books are shelved illustrate Popper´s many fields of interest and his wide reading habits:

• 2.1 Philosophy, Logic
• 2.2 Science
• 2.3 Politics, Economics, Social Sciences
• 2.4 History
• 2.5 Various fields:
  • 2.5.1 Psychology
  • 2.5.2 Religion
  • 2.5.3 Music
  • 2.5.4 Arts and Antiquities
  • 2.5.5 Classical Literature
  • 2.5.6 Travels, Voyages of Discovery, Mountaineering
  • 2.5.7 Novels, Light Reading
  • 2.5.8 Children´s Books
  • 2.5.9 Bibliophily
• 2.6 Law
• 2.7 Varia
• 2.8 Works of Reference
• 2.9 Journals
• 2.10 Offprints of writings of others
• 2.11 Universities and other scientific institutions