August Derleth's "Posthumous Collaborations" is a 6-book series first released in 1945 with contributions by H.P. Lovecraft and August Derleth.
1945 • 1 Reader • 233 pages
1974 • 1 Reader • 284 pages
1945 • 3 Readers • 2.5
1974 • 1 Reader • 320 pages
1974 • 1 Reader • 289 pages