9 books in series
Collector's Library of the Unknown
Collector's Library of the Unknown is a 9-book series first released in 1882 with contributions by Ignatius L. Donnelly, Upton Sinclair, and 4 others.
1882 • 2 Readers • 490 pages
1882 • 1 Reader • 490 pages
1882 • 2 Readers • 490 pages • 5
1929 • 1 Reader • 208 pages
1966 • 1 Reader • 350 pages
1966 • 1 Reader • 465 pages • 4
1940 • 1 Reader • 255 pages
1972 • 1 Reader • 276 pages