Note biografiche e bibliografia di J.N. Williamson
Nel 1987 si dedicò al saggio How to Write Tales of Horror, Fantasy & Science Fiction, volume che con il contributo di altri importanti scrittori racconta i temi della scrittura horror e cita opere di scrittori come Robert Bloch, Lee Prosser, Richard Matheson, Ray Bradbury, HP Lovecraft, August Derleth, William F. Nolan e Stephen King. .
Per un lungo periodo curò Masques, una popolare serie di antologie che divenne vero trampolino di lancio per scrittori affermati e non.
- Ghost Mansion
 - Ghost Mansion 1981
 - Horror Mansion 1982
 
- Lamia Zacharius
 - Death-Coach 1981
 - Death-Angel 1981
 - Death-School 1982
 - Death-Doctor 1982
 
- Martin Ruben
 - The Ritual 1979
 - Premonition 1981
 - Brotherkind 1982
 
- The Houngan 1980 o Profits 1984
 - Horror House 1981
 - Queen of Hell 1981
 - The Banished 1981
 - 1983 - Gli emarginati - Urania 949, Arnoldo Mondadori Editore
 - The Tulpa 1981
 - Extraterrestrial 1982 (come Julian Shock)
 - Playmates 1982
 - The Evil One 1982
 - The Dentist 1983
 - The Offspring 1984
 - Ghost 1984
 - Babel's Children 1984
 - The Longest Night 1985
 - Wards of Armageddon 1986 (con John Maclay)
 - Noonspell 1987
 - Evil Offspring 1987
 - Dead to the World 1988
 - The Black School 1989
 - Shadows of Death 1989
 - Hell Storm 1991
 - The Night Seasons 1991
 - The Monastery 1992
 - The Book of Webster's 1993 o Spree 1998
 - Don't Take Away the Light 1993
 - Bloodlines 1994
 - The Haunt 1999
 - Affinity 2001
 
- Anomalies 1983
 - Nevermore! 1983
 - The Naked Flesh of Feeling 1991
 - The Fifth Season 1993
 - Frights of Fancy 2000
 
- SPWAO Showcase
 - 7 SPWAO Showcase #7, 1989-1990 1989
 
- Masques
 - Masques 1984
 - Masques II 1987 o Masques Two 1989
 - 1988 - Masques II - Horror Story 1, Garden Editoriale
 - Masques III 1989 o Fleshcreepers 1990
 - Masques IV 1991
 - Masques V 2006 (con Gary A. Braunbeck)
 - The Best of Masques 1988
 - Dark Masques 2001 (raccolta contiene i volumi 1-2 della serie)
 - Darker Masques 2002 (raccolta contiene i volumi 3-4 della serie
 
- Time to Murder 1966
 - They Never Even See Me 1970
 - Golden Years 1976
 - Statement of the Accused 1977 o Home Free 1977
 - "Absolute Peace and Quiet" 1983
 - Anything to Help the Duke 1983
 - Belonging 1983
 - Keeping Christmas 1983
 - Stalemate 1983
 - The Dotted Line 1983
 - Turning 40 for Fun and Prophet 1983
 - Review of the Latest Arrivals 1983
 - Leitmotif 1984
 - Milestones 1984
 - Vital Parts 1984
 - House Mothers 1984
 - Nature and Mr. Humphries 1984
 - Small Gift from Home 1984
 - The Bus People 1985
 - The Dearly Departed 1985
 - The Gap Nearly Closed Today 1985
 - Uncoverup 1985
 - "Don't" 1985
 - A Matter of Identification 1985
 - Little Doll from the Backwoods 1985
 - Souvenir 1985
 - Aspirations 1985
 - I'll Give You My Magic, If You'll Give Me Your Love 1985
 - Orwell Redux 1985
 - Flush 1985 with Milton Hillman
 - One Look at You & the Earth Moves Beneath My Feet 1985
 - Bleed Bargaining 1986
 - Hellter-Shelter! 1986
 - If I Make My Bed in Hell 1986
 - Renunciations 1986
 - The Book of Webster's 1986
 - The Bountiful Spirit 1986
 - The Night Seasons 1986
 - The Scars of Bonding 1986
 - The House of Life 1986
 - The Legend of Lincoln County 1986
 - The Queerness of Time 1986
 - The Final Stages of the Creeping Crud 1986
 - Devil's Powder 1986
 - Conspiracies 1987
 - Privacy Rights 1987
 - Starry Coping 1987
 - The Better Half 1987 (con John Maclay)
 - Townkiller 1987
 - Wordsong 1987
 - 1988 - Wordsong in Masques II - Horror Story 1, Garden Editoriale
 - 1995 - Wordsong in Popsy e altri racconti - Economica Tascabile 23, Fanucci Editore
 - Happy Hour 1987
 - Watchwolf 1987
 - After-Howl 1988
 - Fancy That 1988
 - Nosmael 1988
 - Public Places 1988
 - Mercy 1988
 - Two Floor Generals and the Sweetheart Dance 1988
 - Amorphous 1988
 - Jezebel 1989
 - Monstrum 1989
 - 1989 - Monstrum in Estate Horror 1993. Mostri. 37 racconti - Horror 4, Arnoldo Mondadori Editore
 - The Unkindest Cut 1989
 - Overnight Pass 1989 (con John Maclay)
 - You'd Better Watch Out 1989
 - Too Hideous to be Played 1989
 - Everyone Must Know... 1989
 - Pact 1989
 - Vampire Nostalgia 1989
 - The Sudd 1989
 - Parnassus on Wheels II 1990
 - The Bridge People 1990
 - My Brother, the Sex Fiend 1990 (con D.W. Taylor)
 - Sleepover 1990
 - Happier Endings 1990
 - Wotan's Oak 1990
 - No Love Lost 1991
 - Something Extra 1991 (con James Kisner)
 - The Oldest Human Trick 1991
 - Herrenrasse 1991
 - Collaborationists 1991
 - Land of the Second Chance 1991
 - Eater of the Dead 1992
 - The Train Man 1992
 - Watchful Eyes 1992
 - Free Among the Dead 1992
 - The Girl of My Dreams 1992
 - Cycles 1993
 - God's Mouth to Your Ear 1993
 - Health Hazard 1993
 - Just One More Thing People Can Do 1993
 - Reality Function 1993
 - Snowlight 1993
 - The Carolers 1993
 - Troth 1993
 - Dead Body Run 1993
 - Frankenstein Seen in the Ice of Extinction 1993
 - Child of the Sea 1994
 - Indecent Proponent 1994
 - The Autonomic Nervous System, Klaus Von Clausewitz, and Omilian 1994
 - The Field of Blood 1994
 - The Last Nazi Invasion 1994
 - Mostly the Evil Shows 1994
 - The Vardoger 1994
 - Origin of a Species 1995
 - Time Tells Us 1995
 - Vladimir's Conversions 1995
 - The Mother Pact 1995
 - High Concept 1995
 - A Misunderstanding at Midnight 1995
 - The Last Link Between Life and Death 1995
 - Beasts in Buildings, Turning 'Round 1996
 - On the Late Train Through Texas 1996
 - Two Hands Are Better Than One 1996
 - Hildekin and the Big Diehl 1996
 - The Piano Player Has No Fingers 1997
 - It Does Not Come Alone 1997
 - A. Pyme 2000
 - Pick-Up 2000
 - When Nature Itself Creates Them 2000
 - Outcry 2006
 
