History ContinuityNod / Literature

** Tons and tons of them in the modern novel line. Just one example: in [[StarTrekATimeTo Star Trek: A Time to Kill]], President Zife ends up getting a list of crises which occurred on his watch recited to him. These are, of course, all references to other novels. There was [[StarTrekTheGenesisWave the Genesis Wave]], the [[StarTrekVoyagerRelaunch Holostrike]], the [[StarTrekDeepSpaceNineRelaunch Trill debacle]], the [[StarTrekNewFrontier Selelvians]]...

* The popular "it's a trap!" quote and {{meme|ticMutation}} from the ''Franchise/StarWars'' films is given a ContinuityNod twice in the ''Literature/LegacyOfTheForce'' novel series; once by [[MamaBear Mara Jade]] in ''Sacrifice'', and once by [[MartialPacifist Luke]] in ''Revelation''.

* HBeamPiper example: in ''Uller Uprising'', there's a romance between General Carlos von Schlichten and his adjutant, Paula Quinton. In ''Federation'', the short story "Oomphel in the Sky" has a reference to a Paula von Schlichten Fellowship.

* The ''Series/DoctorWho'' New Series Adventures novel ''Beautiful Chaos'' is a sequel to the TV story ''Masque of Mandragora'', spinning from the Doctor's claim that the Helix would return after 500 years. It takes a moment to refer to the three other ExpandedUniverse media which took up this plot thread (a Literature/PastDoctorAdventures novel, a Sarah Jane audio drama, and a ''Magazine/DoctorWhoMagazine'' comic strip), explaining that they all involved "fragments" of the Helix, but this was the real thing.
** All sorts of nods to past continuity (notably the Third Doctor era) were referenced in the Virgin publishing novel "Who Killed Kennedy", where the plotline worked in many of the Doctor's adventures, from a [[LowerDeckEpisode ground level]] point of view. In his authors note, David Bishop acknowledged the Kurt Busiek/Alex Ross graphic novel "Marvels", which gave a ground level view of the Marvel Universe.
** Many of the ''Franchise/DoctorWhoExpandedUniverse'' works feature continuity nods, usually to the series, but often to other EU works by the same author. One subtle one: in the Literature/EighthDoctorAdventures novel ''Seeing I'' by Jonathan Blum and Kate Orman (set on an Earth colony in the 23rd century) the Doctor is in a prison/mental institution called the Oliver Bainbridge Functional Stabilisation Centre, where people who [[HeKnowsTooMuch Know Too Much]] are held. At the end of the Literature/PastDoctorAdventures novel ''Blue Box'' by Orman (set in 1980s America), we're told that the villain ended up in the Bainbridge Hospital, which appears to be the same thing, only run by the US Government instead of a {{megacorp}}.
** In the Fourth Doctor PDA ''Millennial Shock'' by Justin Richards, the Doctor offers someone a jelly baby, and the person looks at the sweet in bewilderment. "It was a dolly mixture. He knew it was a dolly mixture." This is a reference to a scene in "[[Recap/DoctorWhoS15E3ImageOfTheFendahl Image of the Fendahl]]", where the Doctor offers a skull a jelly baby, while actually holding a liquorice allsort. (When a viewer pointed this out, WordOfGod was that the Doctor does this to confuse people.)
** In the ''Series/DoctorWho'' novel ''The Last Dodo'', the Tenth Doctor names the titular bird "Dorothea", but [[StealthPun never explains why]]. Dorothea "Dodo" Chaplet was a companion of the First Doctor.

** In the ''Literature/{{Rhinassu}}'' novel ''The Empty Chair'', it’s mentioned that there’s a planet just barely inside the Rihannsu side of the Neutral Zone that is almost richer in dilithium than [[Literature/HowMuchForJustThePlanet Direidi]]. In ''Swordhunt'', a Klingon refers to a "[[Literature/TheFinalReflection Thought Admiral]]".

** In the ''Literature/{Rhinassu}} novel ''The Empty Chair'', it’s mentioned that there’s a planet just barely inside the Rihannsu side of the Neutral Zone that is almost richer in dilithium than [[Literature/HowMuchForJustThePlanet Direidi]]. In ''Swordhunt'', a Klingon refers to a "[[Literature/TheFinalReflection Thought Admiral]]".

* PeterDavid's ''Literature/StarTrekNewFrontier'' novels (part of the ''Franchise/StarTrek'' ExpandedUniverse) include an immortal character named Morgan Primus. It's hinted that the character may be the same as Number One (from "The Cage"), suggested that she is the original model for shipboard computers' voices, and both Jean-Luc Picard and Montgomery Scott mistake her for other women they're familiar with (Lwaxana Troi and Christine Chapel, respectively). All of which is a big wink at the numerous roles that actress Majel Barrett (-Roddenberry) has filled in the Franchise/TrekVerse.
** David loves these. In ''Q-Squared'', the bartender in one of the parallel universes is not Guinan, but Yeoman [[WhoopiGoldberg Caryn Johnson]].
* The popular "it's a trap!" quote and {{meme|ticMutation}} from the ''Franchise/StarWars'' films is given a ContinuityNod twice in the ''Literature/LegacyOfTheForce'' novel series; once by [[MamaBear Mara Jade]] in ''Sacrifice'', and once by [[MartialPacifist Luke]] in ''Revelation''.

** References to "[[RunningGag I have a bad feeling about this]]" are rife in the ''Franchise/StarWarsExpandedUniverse''. And ''Death Star'' is absolutely packed with acknowledgments about the builders of the Death Star, the prototypes, and what else is going on in the galaxy.

* Tons and tons of them in the modern novel line from the Franchise/StarTrekExpandedUniverse. Just one example: in [[StarTrekATimeTo Star Trek: A Time to Kill]], President Zife ends up getting a list of crises which occurred on his watch recited to him. These are, of course, all references to other novels. There was [[StarTrekTheGenesisWave the Genesis Wave]], the [[StarTrekVoyagerRelaunch Holostrike]], the [[StarTrekDeepSpaceNineRelaunch Trill debacle]], the [[StarTrekNewFrontier Selelvians]]...

* ''Literture/RainbowDashAndTheDaringDoDoubleDare'':

** Also, note that the first chronological literary appearance of the ''Dies Irae'' was in the very first ''Heresy'' novel, and it went on to play a major part in the series. ''Dies Irae'' appears ''ten thousand years later'' as a Chaos Titan that played a major part in GrahamMcNeill's ''Storm of Iron'' novel, written long before the ''Heresy'' novels.

** Many of the DoctorWhoExpandedUniverse works feature continuity nods, usually to the series, but often to other EU works by the same author. One subtle one: in the Literature/EighthDoctorAdventures novel ''Seeing I'' by Jonathan Blum and Kate Orman (set on an Earth colony in the 23rd century) the Doctor is in a prison/mental institution called the Oliver Bainbridge Functional Stabilisation Centre, where people who [[HeKnowsTooMuch Know Too Much]] are held. At the end of the Literature/PastDoctorAdventures novel ''Blue Box'' by Orman (set in 1980s America), we're told that the villain ended up in the Bainbridge Hospital, which appears to be the same thing, only run by the US Government instead of a {{megacorp}}.

* One of the protagonists of the Series/HostileTakeover series is a [[Literature/MoreauSeries Frankenstein]] whose ancestors were optimized for neural interface with computers. She shares a surname with a frankenstein hacker who plays a significant role in [[Literature/MoreauSeries ''Specters of the Dawn'']]

* In the ''Series/DoctorWho'' novel ''The Last Dodo'', the Tenth Doctor names the titular bird "Dorothea", but [[StealthPun never explains why]]. Dorothea "Dodo" Chaplet was a companion of the First Doctor.

* In the Fourth Doctor PDA ''Millennial Shock'' by Justin Richards, the Doctor offers someone a jelly baby, and the person looks at the sweet in bewilderment. "It was a dolly mixture. He knew it was a dolly mixture." This is a reference to a scene in "[[Recap/DoctorWhoS15E3ImageOfTheFendahl Image of the Fendahl]]", where the Doctor offers a skull a jelly baby, while actually holding a liquorice allsort. (When a viewer pointed this out, WordOfGod was that the Doctor does this to confuse people.)

** Many of the DoctorWhoExpandedUniverse works feature continuity nods, usually to the series, but often to other EU works by the same author. One subtle one: in the Literature/EighthDoctorAdventures novel ''Seeing I'' (set on an Earth colony in the 23rd century) the Doctor is in a prison/mental institution called the Oliver Bainbridge Functional Stabilisation Centre, where people who [[HeKnowsTooMuch Know Too Much]] are held. At the end of the Literature/PastDoctorAdventures novel ''Blue Box'' by Orman (set in 1980s America), we're told that the villain ended up in the Bainbridge Hospital, which appears to be the same thing, only run by the US Government instead of a {{megacorp}}.

* ''TabletopGame/{{Warhammer 40000}}: Literature/GauntsGhosts'' has quite a few nods to other books DanAbnett has written, and almost all of his books include references to the events and characters in his other works. Many, however, are retroactive, having been written about first as a passing reference, then [[SequelHook developed into a full story]]. This can result in circular Continuity Nods.

* Understandably, this happens in every single HardyBoys book ever.