The 32
Dark Shadows novels plus a movie tie-in and a couple of oddities published by Paperback Library between 1966-72, all bar the anthology and joke book are attributed to 'Marilyn Ross' (William Edward Daniel Ross).
1. Dark Shadows (1966)
2. Victoria Winters (1967)
3. Strangers At Collins House (1967)
4. The Mystery Of Collinwood (1968)
5. The Curse Of Collinwood (1968)
6. Barnabas Collins (1968)
7. The Secret Of Barnabas Collins (1969)
8. The Demon Of Barnabas Collins (1969)
9. The Foe Of Barnabas Collins (1969)
10. The Phantom And Barnabas Collins (1969)
11. Barnabas Collins Versus The Warlock (1969)
12. The Peril Of Barnabas Collins (1969)
13. Barnabas Collins And The Mysterious Ghost (1970)
14. Barnabas Collins And Quentin's Demon (1970)
15. Barnabas Collins And The Gypsy Witch (1970)
16. Barnabas, Quentin And The Mummy's Curse (1970)
17. Barnabas, Quentin And The Avenging Ghost (1970)
18. Barnabas, Quentin And The Nightmare Assassin (1970)
19. Barnabas, Quentin And The Crystal Coffin (1970)
20. Barnabas, Quentin And The Witch's Curse (1970)
21. Barnabas, Quentin And The Haunted Cave (1970)
22. Barnabas, Quentin And The Frightened Bride (1970)
23. Barnabas, Quentin And The Scorpio Curse (1970)
24. Barnabas, Quentin And The Serpent (1970)
25. Barnabas, Quentin And The Magic Potion (1971)
26. Barnabas, Quentin And The Body-Snatchers (1971)
27. Barnabas, Quentin And Dr. Jekyll's Son (1971).
28. Barnabas, Quentin And The Grave Robbers (1971)
29. Barnabas, Quentin And Sea Ghost (1971)
30. Barnabas, Quentin And The Mad Magician (1971)
31. Barnabas, Quentin And The Hidden Tomb (1971)
32. Barnabas, Quentin And The Vampire Beauty (1972)
House Of Dark Shadows (1970)
Barnabus Collins & Quentin (eds.) - The DarK Shadows Book Of Vampires & Werewolves (1970)
Anon - Barnabus Collins In A Funny Vein (1969)
.... and a fair smattering of Marilyn Ross in Paperback Library. It's not unlikely that there are a good few more!
Marilyn Ross - Beware My Love (1965)
Marilyn Ross - Haunting of Fog Island (1965)
Marilyn Ross - The Locked Corridor (1965)
Marilyn Ross - Dark Legend (1966)
Marilyn Ross - Desperate Heiress (1966)
Marilyn Ross - A Gathering Of Evil (1966)
Marilyn Ross - Phantom Manor (1966)
Marilyn Ross - Memory Of Evil (1966)
Marilyn Ross - Desperate Heiress (1966)
Marilyn Ross - Assignment - Danger (1967)
Marilyn Ross - Cameron Castle (1967)
Marilyn Ross - Shorecliff (1968)
Marilyn Ross - Beware, My Love! (1969)
Marilyn Ross - Satan's Rock (1970)
Marilyn Ross - Dark Legend (1970)
Marilyn Ross - A Gathering of Evil (1970)
Marilyn Ross - The Aquarius Curse (1970)
Marilyn Ross - Mistress Of Ravenswood (1970)
Marilyn Ross - Phantom Manor (1970)
Marilyn Ross - Shorecliff (1970)
Marilyn Ross - Witch's Cove (1971)
Marilyn Ross - Phantom of Fog Island (1971)
Marilyn Ross - Message from a Ghost (1971)
Marilyn Ross - Mistress of Moorwood Manor (1972)
Marilyn Ross - Night of the Phantom (1972)
Marilyn Ross - Phantom of the Swamp (1972)
Marilyn Ross - Dark Stars Over Seacrest (1972)
Marilyn Ross - The Sinister Garden (1972)
Marilyn Ross - The Witch of Bralhaven (1972)
Marilyn Ross - The Devil's Daughter (1973)
Marilyn Ross - Step Into Terror (1973)
Marilyn Ross - Message From A Ghost (1971)
Marilyn Ross - Mistress of Moorwood Manor (1972)
Marilyn Ross - The Long Night of Fear (1972)