Sämtliche Werke in fünf Bänden (Arthur Schopenhauer) is a 4-book series with 4 primary works first released in 1818 with contributions by Arthur Schopenhauer, Judith Norman, and 2 others.
1818 • 48 Readers • 575 pages • 4
1844 • 9 Readers • 720 pages
1851 • 3 Readers • 497 pages • 4