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->''"Some writers write stories that grab you by the throat. Graham Masterton tears out your thyroid, reaches down your esophagus, rips out your stomach, liver and some intestines, stomps on them and sets the remains on fire."''
-->-- Review of ''The Sleepless''

Graham Masterton, born in 1946 in Edinburgh, Scotland, is a prolific writer in several genres who is most famous for his voluminous output of horror stories. Prior to becoming a full-time writer, he edited the UK editions of men's magazines ''Penthouse'' and ''Playboy''. Quite possibly as a spin-off of this career, he wrote hack sex comedies and several volumes of sex manuals, something he has cheerfully never tried to disguise or conceal as an embarrassing reminder of what he did to earn a living before his literary career ''really'' took off.

!!Significant works by this author include:

* ''Literature/TheManitou''/''Harry Erskine'' series:
** ''The Manitou'' (1976)
** ''The Djinn'' (1977)[[note]]Featuring Harry Erskine from ''The Manitou'', but no actual Manitou.[[/note]]
** ''Revenge of the Manitou'' (1979)
** ''Burial'' (1991)
** ''Spirit Jump'' (short story; collected in anthology ''Faces of Fear'') (1996)
** ''Manitou Blood'' (2005)
** ''Blind Panic'' (2009)
** ''Plague of the Manitou'' (2015)
* ''Night Warriors'' series:
** ''Night Warriors'' (1987)
** ''Death Dream'' (1988)
** ''Night Plague'' (1991)
** ''Night Wars'' (2006)
** ''The Ninth Nightmare'' (2011)
* ''Rook'' series:
** ''Rook'' (1997)
** ''Tooth and Claw'' (1997)
** ''The Terror'' (1998)
** ''Snowman'' (1999)
** ''Swimmer'' (2001)
** ''Darkroom'' (2004)
** ''Demon's Door'' (2010)
** ''Garden of Evil'' (2012)
* ''Sissy Sawyer'' series:
** ''Touchy and Feely'' (based on the Beltway snipers) (2005)
** ''The Painted Man'' (also published as ''Death Mask'') (2008)
** ''The Red Hotel'' (2012)
* ''Nathan Underhill'' series:
** ''Basilisk'' (2009)
** ''Petrified'' (2011)
* ''Katie Maguire'' series
** ''White Bones'' (also published as ''Katie Maguire'' and ''A Terrible Beauty'') (2003)
** ''Broken Angels'' (also published as ''Voice of an Angel'') (2012)
** ''Red Light'' (2014)
** ''Taken for Dead'' (2014)
** ''Blood Sisters'' (2015)
** "Eye for an Eye" (short story) (2015)
** ''Buried'' (2016)
** ''Living Death'' (2016)
** "The Drowned" (short story) (2016)
** ''Dead Girls Dancing'' (2016)
** ''Dead Men Whistling'' (2018)
** ''Begging to Die'' (2019)
** ''The Last Drop of Blood'' (2020)
* Standalone works:
** ''Literature/DeathTrance'' (1986)
** ''The Devils of D-Day'' (1978)
** "Literature/EricThePie" (short story) (1991)

!! This author's works provide examples of:

* AbandonedHospital: Setting for ''Walkers''.
* AntagonistTitle: ''Tengu'', referring to the evil demon.
* ArtifactOfDoom: The titular ''Heirloom'' and ''Mirror''.
* {{Autocannibalism}}: Behind the cult in ''Ritual'' (published as ''Feast'' in the USA).
* CelebrityParadox: Harry Erskine, narrator and recurring character of the ''Manitou'' novels, is a fictional character in ''Black Angel''.
* ChestBurster: The very first novel in the Night Warriors series features womb-bursting eels tearing out of women who had sex with Yaomatil, the demon who's also known as Asmodeus. The eels are the malevolent, monstrous sperm cells of Yoamatil that planted itself to the uterine wall and grow until they're tear out and do some evil like bite off the face of one poor cop.
* CreepyChangingPainting: One of many effects ''The Heirloom'' has on its owner's property.
* Franchise/CthulhuMythos: Misquamacus, of the ''[[Literature/TheManitou Manitou]]'' series, originates from Creator/AugustDerleth and Creator/HPLovecraft's ''The Lurker at the Threshold''. Several of his standalone novels and short stories also take inspiration from the Mythos, such as ''Prey'' and ''The Wells of Hell''.
* DarkestAfrica: Setting for ''Solitaire''.
* DayOfTheJackboot: The USA lets the USSR take over Western Europe in a 1985 political thriller. Its title? ''Sacrifice''.
* DemonicPossession: The U S [[PresidentEvil President]] in ''The Hell Candidate''.
* DisproportionateRetribution: Exaggerated in ''Tengu'':
-->...was only intended to be the start. Kappa planned to attack one nuclear-power station after another, year by year, until America's spirit was broken and her lands were glowing with radioactivity. She would never rise again. What Kappa wanted to do was to release so much nuclear energy into her atmosphere that her children would be born dead or deformed for centuries to come
* {{Doorstopper}}: ''Rich'', the decades-spanning ''{{Series/Dallas}}'' -style saga of the Cornelius family, runs to over 700 pages.
* DontTryThisAtHome: A stickler for accuracy, Masterton added a disclaimer to ''The Devils of D-Day'':
-->All of the devils and demons that appear in this book are legendary creatures of Hell, and there is substantial recorded evidence of their existence. For that reason, it is probably inadvisable to attempt to conjure up any of them by repeating out loud the incantations used in the text, which are also genuine.
* DreamLand: the setting of ''Night Warriors'' and other stories.
* DuringTheWar: The American Civil War takes place during ''Railroad'', World War One during ''Lady of Fortune'', World War Two during ''Lords of the Air''.
* TheEndOrIsIt: Many of his stand-alone horror novels finish on [[SequelHook a hint that the evil is not vanquished]].
* ExtraExtraReadAllAboutIt: ''Headlines'', set in the 1949 offices of a Chicago newspaper.
* TheFamine: ''Famine'', 1980 novel.
* FantasticFightingStyle: Arcane martial arts in ''Tengu''.
* GaiasVengeance: David gets a terrifying glimpse of a polluted future world in ''Prey''.
* GenuineHumanHide: What the Grays need in ''Family Portrait''.
* {{Ghostapo}}: ''The Devils of D-Day'' inverts this, as it's the Allies who were in league with demons, using thirteen possessed tanks for the breakout from the Normandy beachhead.
* GovernmentAgencyOfFiction: 'Lamprey' in ''Sacrifice''.
* HeManWomanHater: An entire organization of them in ''Edgewise'' -- [=FLAME=], or Father's League Against Mother's Evil, who claim to be performing a holy mission when they target and murder (via [[KillItWithFire burning]]) divorced women who've gotten custody of their children, then deliver the children to their father. And they perform these murders whether or not the father ''wanted'' his ex dead.
* HiddenInPlainSight: The hair of the Coyote demon in ''Charnel House'' [[spoiler:is entwined around a cable in the Golden Gate Bridge.]]
* HighClassCallGirl: Colleen Petley in ''Ikon''.
* HistoricalInJoke:
** In ''Tengu'', [[spoiler:Hiroshima was chosen as a target for the atomic bomb to obliterate a place where indestructible warriors possessed by demons were being created]].
** In ''A Terrible Beauty'', [[spoiler:the ''Lusitania'' was torpedoed because British intelligence informed the German admiralty that a wanted murderer was aboard the ship]].
* HistoricalFiction: ''Solitaire'', ''Empress'' among others.
* HistoricalRapSheet: In ''The Pariah'', the death of the Toltecs, the atrocities of Caligula, the Black Death and the Salem witch trials are all attributed to the demonic antagonist.
* HollywoodExorcism:
** The Pope against the Devil in ''The Hell Candidate''.
** Averted in ''The Devils of D-Day'' where it's pointed out that exorcisms are hardly ever used these days, and the only priest who actually believes in the danger is too old and feeble for the task.
* HoneyTrap: The U S President falls victim to one in ''Ikon''.
* HowWeGotHere: Historical sagas including ''Railroad'', ''Solitaire'', ''Corroboree'' and ''Silver'' have prologues set after the rest of the story.
* ItWillNeverCatchOn: ''Lady of Fortune'' has early 20th Century investment bankers dismissing motor-cars and the Thompson machine gun as not worth investing in.
* LandDownUnder: ''Corroboree'' is set in 19th-Century Australia. Protagonist Eyre Walker [[BoldExplorer leads an expedition]] into its uncharted deserts.
* LiterallyShatteredLives: ''Walkers''.
* MadLibThrillerTitle: ''The Sweetman Curve'', ''The Hell Candidate'', ''The Chosen Child'', ''The Ninth Nightmare'', ''The Red Hotel''.
* {{Magitek}}: The weapons and armor of the Night Warriors are powered by Dream energy and given to them by what's essentially {{God}}. These include a laser-shooting {{BFG}} and a hypersonic, flying skateboard. Over the centuries, the Night Warriors' powers and equipment have improved in line with human technology advancing.
* MagicalNativeAmerican: ''Charnel House'' 's George Thousand Names, and George Iron Walker (who quickly turns out to be an antagonistic version) in ''Edgewise''.
* MirrorUniverse: Martin Williams enters a literal one in ''Mirror''.
* NaziHunter: Bill Bennett in ''Condor''.
* NiceJobBreakingItHero:
** In ''Famine'', farmer Ed Hardesty is made to do a TV appeal that confirms the cover story for the impending crisis. Instead, he follows his conscience and tells the truth to the nation, triggering the collapse of society.
** In ''The Devils of D-Day'', an American cartographer frees a demon trapped in a World War 2 tank because [[LeakingCanOfEvil its influence is poisoning the surrounding village]]. The demon murders the local priest before it can be exorcised, and forces him to travel to England to free the rest of its brethren.
* PenName: Masterton published a few as 'Thomas Luke' (including a {{Novelization}} of the movie ''Phobia'' -- which mentioned another of his novels, ''The Hell Candidate'').
* ThePlague: ''Plague'', 1976 novel set in Miami and New York.
* PrescienceByAnalysis: A corrupt senator uses ''The Sweetman Curve'' to predict who will vote against him.
* {{Prospector}}: Henry T. Roberts, protagonist of ''Silver'', is an unwitting one.
* RapeIsASpecialKindOfEvil: Literally so in ''Night Plague''.
* RecurringCharacter:
** Kate Maguire and Jim Rook have their own series.
** Springer, the guide for ''Night Warriors''.
* RippleEffectProofMemory: After David undoes the events of ''Prey'', only his son doesn't remember them.
* TheRoaringTwenties: ''Maiden Voyage'' -- of the SS ''Arcadia'', [[GoldMakesEverythingShiny the most luxurious ocean liner]] ever built.
* ScrewTheRulesIHaveMoney: Could be the Cornelius family motto in ''Rich''.
* SealedEvilInACan: Literally so in ''The Devils of D-Day'', where a demon is welded up inside a World War 2 tank.
* SensualSlavs: ''Sacrifice'' 's Rufina Konstantinova and Inge Schultz.
* SerialKiller: The Fog City Satan in ''Black Angel'' and [[spoiler:Lenny Multkin]] in ''Headlines''.
* SettingUpdate: ''Family Portrait'' was a modernised ''Literature/ThePictureOfDorianGray''.
* TheSleepless: Literally in the 1993 novel of the same name, in which the antagonists are a species of beings who don't sleep.
* SpookySeance: In ''Black Angel''.
* StateSec: In 1982's ''Ikon'', learning that [[spoiler:the USSR is secretly running the USA]] is a death sentence.
* SuddenDownerEnding: ''Tengu''.
* SuperTeam: This is essentially what the Night Warriors are, they are a team of people assembled by [[{{God}} Ashapola]] and given unique powers (one guy was [[SuperSpeed a speedster]] with a hypersonic, flying skateboard!!) to safeguard humanity from the forces of darkness that haunt the dreamworld.
* SyntheticPlague: Unleashed in ''Condor''.
* TakenForGranite: ''Walkers''.
* TheXOfY: ''The Devils of D-Day'', ''The Wells of Hell''.
* ThoseMagnificentFlyingMachines: ''Lords of the Air'', about an aircraft-manufacturing family.
* TreasureChestCavity: Painful hiding-place for the diamond in ''Solitaire''.
* TurnInYourBadge: Lieutenant Foggia is forced to in ''Black Angel''.
* {{Wendigo}}: One of the main antagonists of ''Edgewise'', along with the man who summoned it up.
* WeNeedADistraction: A few to get police looking the wrong way in ''Ikon''.
* WhereAreTheyNowEpilogue: In ''The Sweetman Curve'' and ''The Sleepless''.
* WhiteMagic: Used by the Pope against the Devil in ''The Hell Candidate''.
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