These collection portals contain literature that was mostly published after 1900.

• H.C. Artmann-Sammlung (Knupfer) - Artmann's entire literary oeuvre with numerous first editions, plays, book publications and the posthumously published writings.
   
• Sammlung Georg Andreas und Gerlinde Bachem - The principle: a printed European book on the shelf from every year of the 15th to the 20th century.
   
• Bibliothek Belgisches Haus -  over 5,000 volumes donated by the Belgian state.
   
• Kulturkreis Belgien Luxemburg - Inhaltsverzeichnisse - 120 periodicals of the cultural circle Belgium/Luxembourg for the period 1890 to the present.
   
• Sammlung Fred Bänfer - more than 1,200 books and texts, published from 1684 to 1850, from French and English fiction, poetry, children's and youth literature, bibliophilia and curiosities.
   
• Bibliothek Herbert von Dirksen - 1,500 volumes of Ambassador Dirksen, who worked in Moscow, Tokyo and London from 1928 - 1940.
   
• Einbandsammlung - view over 350 testimonies of solid craftsmanship, artistic inspiration and publishing care.
   
• Sammlung Gertrud von LeFort - independently published writings of the author in various editions and editions, including some first editions.
   
• Illustrierte Belletristik - Gernot Uwe Gabel Collection - illustrated fiction of the 18th to 20th centuries from various literary genres.
• Sammelsschwerpunkt Islandica - a collection of 10,000 titles around and about Iceland that is unique in the German-speaking world.
   
• Sammlung Kölner Zeitungsartikel - Kölner Stadt-Anzeiger and Kölnische Rundschau - issue K from 1970 - 1984 and 1990 - 1991.
   
• Sammlung Immo Mikloweit - Donation by Immo Mikloweit on the history of the automobile in Cologne.
   
• Sammlung Eduard Prüssen - Illustrations in printmaking technique as woodcuts and linocuts and as etchings, book, press and advertising illustrations, posters, bookplates, hand press prints, self-illustrated books, sketches and drafts.
   
• Bibliothek Jürgen Scholle -  Books from the 18th and 19th centuries from the epoch of the Enlightenment, Romanticism, Realism and the Gründerzeit.
   
• Sammlung Martin Stankowski - Standard works on the city history of Cologne, alternative literature, books on Cologne and on rare cultural and social history topics.
   
• Sammlung Otto Wolff - Literature on German (esp. Prussian) and French history Especially for the revolutions of 1789, 1830 and 1848.