Dark Days: A Memoir is by D. Randall Blythe. It has 498 pages.
Dark Days (Dead City Book 3) is by James Ponti.
It has 304 pages.
When It Was Dark has 412 pages.
Dark Watch has 357 pages.
Dark Detectives has 395 pages.
The Dark Rival has 126 pages.
Into a Dark Realm has 386 pages.
The Dark Other has 256 pages.
Dark Prince has 314 pages.
Reading in the Dark has 220 pages.
In the Winter Dark has 132 pages.
Dark Challenge has 368 pages.
The Dark Half has 431 pages.
Dark Apprentice has 354 pages.