Immanuel Kant
Kant developed his moral philosophy in three works: "Groundwork of the Metaphysic of Morals" (1785), "Critique of Practical Reason" (1788), and "Metaphysics of Morals" (1797).
Karl May
Thirty-three volumes of "Carl May's Gesammelte Reiseromane", ("Karl May's Gesammelte Reiseerzählungen") were published from 1892 to 1910 by Friedrich Ernst Fehsenfeld. Most had been previously published in "Deutscher Hausschatz", but some were new. The best known titles are the "Orient Cycle" (volumes 1 - 6) and the "Winnetou-Trilogy" (volumes 7 - 9). Beyond these shorter cycles, the works are troubled by chronological inconsistencies arising when original articles are revised for book editions.May's oeuvre includes some shorter travel stories that were not published within this series (for example, "Eine Befreiung" in "Die Rose von Kaïrwan", 1894). After the founding of the Karl May Press in 1913, works in "Gesammelte Werke" were revised (sometimes extensively) and many received new titles. Texts (other than those from Fehsenfeld Press) were also added to the new series.