The Mask of Cthulhu has 201 pages.
Acolytes of Cthulhu has 390 pages.
Cthulhu's Reign has 309 pages.
The Trail of Cthulhu has 248 pages.
Cthulhu's Dark Cults has 256 pages.
Cthulhu Mythos anthology has 540 pages.
The Mask of Cthulhu was created in 1958.
Confessions of a Mask has 254 pages.
The Mask - novel - has 320 pages.
Crystal Mask has 255 pages.
The Mask of Apollo has 366 pages.
Dare to Be Scared has 159 pages.
The Clue of the Velvet Mask has 192 pages.