->''"And as the dull, watery sun washed out those long nights, I would go back up to my room and I would look into my mirror, and I would ask in the queasy dawn:\\
And the mirror would answer:\\
MY NAME IS JOHN HODGMAN. But that is all over now."''[[labelnote:240]][[ComicallyMissingThePoint "The mirrors at the Chateau Marmont are AMAZING."]][[/labelnote]]

Short for:\\
''As Long Threatened and Longer Postponed, Herein you Will Find: A Third Compendium ("Tri-Pendium") of Complete World Knowledge, Now and Finally Complete, As Set Down by Me, A Former Professional Literary Writer; A Former Former Professional Literary Agent; A Minor Television Personality Who Is Arguably Still Famous In Some Circles; and ... A Current DERANGED MILLONAIRE, Who Is Known In Your Language as JOHN HODGMAN Simultaneously Covering and Uncovering Such Previously Un-touched-upon Subjects As... The Practice and Pronunciation of "Oenophilia"; The Ancient Teachings of The ''Americanomicon''; The Meaning of your Dreams; Gentleman Criminals; How Boats Work; How To Raise Sperm Wales; The Secrets of The Master Magicians; How To Finally Become Happy and Wealthy As A Deranged Millionaire Before The Coming Global Super-Collapse and The End of Human Civilization, aka "Ragnarok"; Plus: Sports! As Well As Most Other Subjects, At Last In Such Sufficiency As To Report: '''[[TitleDrop THAT IS ALL]]''' ''

The final entry in the ''Literature/CompleteWorldKnowledge'' trilogy, John Hodgman's last book of fake trivia, and, quite possibly, the last book ever to be printed before the arrival of RAGNAROK and the end of the Earth.

Compared to ''Literature/TheAreasOfMyExpertise'' and ''Literature/MoreInformationThanYouRequire,'' ''That Is All'' retains the humor of its predecessors even as it takes a much [[ToneShift darker tone]]. Hodgman's fame is waning, and now, a newly-minted Deranged Millionaire, he's taken it upon himself to document his Albuterol-induced visions of the final year of human civilization.

!!This book provides examples of, and parodies, the following tropes:
* AIIsACrapshoot:
** The entire subplot about Ray Kurzweil.
** Also, all computers are sentient, and want to kill you. And as soon as the anti-sentience wave is shut down in the coming global superpocalypse, they will.
* AlternateHistory: Apparently the books are set in an alternate timeline where [[UsefulNotes/AdolfHitler Hitler]] drowned during the '30s. UsefulNotes/FranklinDRoosevelt was watching the whole time and did nothing.
* AttackOfThe50FootWhatever: Many of the ancient and unspeakable ones.
** GiantSwimmer: Ole Missus Crushgumbs, Mother Of All Monster Catfish.
** HairRaisingHare: Oester-[[Literature/WatershipDown Rah]].
* BetterByADifferentName: A variant. Hodgman writes that he was able to accomplish his goal of getting ''Series/TheAdventuresOfBriscoCountyJr'' back on the air, except he had nothing to do with it and the show is now called ''Series/BurnNotice''.
* BigfootSasquatchAndYeti: The sasquatch seeks police custody. And the reason most people aren't allowed in NYC's Gramercy Park? THERE'S A YETI IN THERE.
* BrickJoke: The [[CoolVersusAwesome Zeppeliners Vs. Submariners Feud]] ends up [[JustForPun surfacing]] unexpectedly, resulting in the tragic death of the jock/nerd {{Steampunk}} messiah Nick Mangold.
* CosmicHorrorStory: Admittedly, a very comic take on the genre.
* DoesNotLikeShoes: In [[https://www.youtube.com/watch?v=Y8oXz1ZKeHU the trailer]], he doesn't bother to put any shoes on before he visits Time Square to promote the book.
* EccentricMillionaire: John Hodgman and other Deranged Millionaires.
** The BLOOD WAVE is actually caused by a Deranged '''Billionaire'''.
* EldritchAbomination: Many of them figure prominently in the end of the world.
* TheEndOfTheWorldAsWeKnowIt
* EtTuBrute: Your dog has BETRAYED US ALL.
* FantasyKitchenSink: All the many, many things contributing the Apocalypse.
* FlatEarthAtheist: Juggoth, God of Atheists Who Is Himself an Atheist
* GentlemanThief: Parodied in "Table 49: Other Gentlemen Criminals", most of whom committed crimes far less glamourous than burglary.
* GrailInTheGarbage: The [[spoiler: giant frozen head of Nug-Shohab]] is found in a walk-in freezer behind some meat, at a South Pole research station.
* HiveMind: DOGSTORM
* {{Homage}}: Nick Mangold's ascension as the Nerd-Jock Messiah is full of these. He credits [[StarWars Admiral Ackbar]] with helping him recognize a trap by an opposing football team, plays a duet of [[VideoGame/{{Portal}} "Still Alive"]] with Creator/FeliciaDay, and reminds nerds and jocks they need to cooperate because [[Literature/ASongOfIceAndFire winter is coming]].
* {{Immortality}}: Discussed at length as a common pursuit of Deranged Millionaires. Popular forms include [[BrainUploading Consciousness Transfer]], [[HumanPopsicle cryogenics]], and [[{{Cyborg}} Cyborgism]].
* JustBeforeTheEnd
* LiteraryAgentHypothesis: The oddly-solemn short story in the last chapter deals with the strange events that gave rise to Hodgman's destiny. [[JustifiedTrope Justified]] in that Hodgman was actually a literary agent before he began writing the ''Literature/CompleteWorldKnowledge'' trilogy.
* LongList: This time, it's a list of the seven hundred [[EldritchAbomination Ancient and Unspeakable Ones.]] Some familiar names crop up, including Nick Nolte and the Century Toad.
* LovecraftLite: More in overall tone than in plot.
* MayanDoomsday
* ManEatingPlant: The Carno-fern. [[ForScience There are no practical uses for it.]]
* MonumentalDamage: Starting with Washington DC being consumed in a storm of green Masonic fire.
* NoteToSelf: The hideous scar you asked about in the previous book turns out to be a reminder to yourself to [[InsaneTrollLogic remember that you have amnesia.]]
* NostalgiaFilter: There's a HiddenElfVillage dedicated to preserving the year 1983, because it was clearly the best childhood ever.
* OverlyLongGag: [[Film/TheyLive "Rowdy" Roddy Piper encounters Keith David in an alley, and the two begin to fight viciously]]. Months later, [[spoiler:as the End Times rage around them and tear the world asunder]], they're ''still'' going at it.
* ScrewTheRulesIHaveMoney: The Diner's Club POFH Nine-Times-Diamond Credit Card. Among its perks: the right to have legitimate ticket-holders thrown out of any event you want to attend, the ability to fake your own death, and a safe house from the coming global superapocalypse.
** KarmicDeath: The safe house is among the first to be destroyed.
* ScrewThisImOuttaHere: [[GiantFlyer The Thunderbirds]] abandon Earth, and the mole-men commit mass suicide via the Century Toad. The hobos, first to see it coming, are already long since gone.
* TheSingularity: Referred to by name.
* ShaggyDogStory: The odyssey of [[spoiler: Nug-Shohab the Headless]]
** RedemptionEqualsDeath
* ZombieApocalypse: Almost entirely averted. The only dead that will rise will be taxidermied animals, and they'll be harmless as they're nailed down and their eyes are glass. A bearskin rug does manage to crawl outside the taxidermist's shop, but it only succeeds in making someone cozy.