Fünf Freunde is a 20-book series with 20 primary works first released in 19 with contributions by Enid Blyton, Juan Ríos de la Rosa, and 2 others.
1942 • 4 Readers • 192 pages • 5
1942 • 2 Readers • 160 pages
1951 • 1 Reader • 196 pages • 4
1953 • 1 Reader • 202 pages • 4
19 • 1 Reader • 184 pages • 4
1952 • 1 Reader • 213 pages • 4
1962 • 1 Reader • 186 pages • 4