THE MYSTERY SERIES

History's Greatest
Unsolved Mysteries

Vanished ships, lost civilizations, unbreakable codes, and deaths that history never explained — some questions refuse to be answered.

The Factology Guru Mystery Series digs into the cases, artifacts, disappearances, and enigmas that have baffled researchers for decades — sometimes centuries. Each book delivers 100 verified facts drawn from historical records, investigation reports, archaeological findings, and expert analysis. No speculation dressed as fact. Just the documented truth about the mysteries that define the limits of human knowledge. New titles added regularly.

The Collection
100 Facts About The Bermuda Triangle
100 Facts About The Bermuda Triangle
The Ocean's Most Dangerous Secret
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100 Facts About Atlantis
100 Facts About Atlantis
The Lost World That Refuses to Stay Lost
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100 Facts About Lost Civilizations
100 Facts About Lost Civilizations
Secrets of the Ancient World
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100 Facts About Ghost Ships
100 Facts About Ghost Ships
Ships That Outlive Their Crew
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100 Facts About Vanished Expeditions
100 Facts About Vanished Expeditions
They Left and Never Came Back
COMING SOON
100 Facts About The Dyatlov Pass Incident
100 Facts About The Dyatlov Pass Incident
Dead Mountain Keeps Its Secrets
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100 Facts About Oak Island
100 Facts About Oak Island
The Treasure Hunt That Never Ends
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100 Facts About The Voynich Manuscript
100 Facts About The Voynich Manuscript
The Book Nobody Can Read
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100 Facts About Ancient Codes and Ciphers
100 Facts About Ancient Codes and Ciphers
Secrets Hidden in Plain Sight
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100 Facts About Hidden Treasures
100 Facts About Hidden Treasures
Fortunes Lost and Never Recovered
COMING SOON
100 Facts About Sunken Cities
100 Facts About Sunken Cities
Civilizations Swallowed by the Sea
COMING SOON
100 Facts About Underground Cities
100 Facts About Underground Cities
The Hidden World Beneath Our Feet
COMING SOON
100 Facts About Forbidden Archaeology
100 Facts About Forbidden Archaeology
Discoveries That Challenge History
COMING SOON
100 Facts About Famous Disappearances
100 Facts About Famous Disappearances
Gone Without a Trace
COMING SOON
100 Facts About Secret Vaults
100 Facts About Secret Vaults
The Locked Rooms of History
COMING SOON
100 Facts About Göbekli Tepe
100 Facts About Göbekli Tepe
The Temple That Rewrote Human History
COMING SOON
100 Facts About Easter Island
100 Facts About Easter Island
The Statues That Still Keep Their Secrets
COMING SOON
100 Facts About The Nazca Lines
100 Facts About The Nazca Lines
Drawings Only the Sky Can See
COMING SOON
100 Facts About Stonehenge
100 Facts About Stonehenge
The Circle That Defies Explanation
COMING SOON
100 Facts About Mysterious Deaths in History
100 Facts About Mysterious Deaths in History
Cases That Were Never Truly Solved
COMING SOON
100 Facts About Lost Nazi Treasure
100 Facts About Lost Nazi Treasure
Billions Hidden and Never Found
COMING SOON
100 Facts About Cursed Objects
100 Facts About Cursed Objects
The Things You Should Never Own
COMING SOON
100 Facts About The Lost Colony of Roanoke
100 Facts About The Lost Colony of Roanoke
CROATOAN and Nothing More
COMING SOON
100 Facts About Ancient Relics
100 Facts About Ancient Relics
Objects That Should Not Exist
COMING SOON
100 Facts About Unsolved Historical Mysteries
100 Facts About Unsolved Historical Mysteries
The Questions History Left Behind
COMING SOON
100 Facts About The Mary Celeste
100 Facts About The Mary Celeste
Sailing, But Nobody Onboard
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100 Facts About The Carroll A. Deering
100 Facts About The Carroll A. Deering
The Ghost Ship of Diamond Shoals
COMING SOON
100 Facts About The MV Joyita
100 Facts About The MV Joyita
Ghost Ship Without a Crew
COMING SOON
100 Facts About The SS Baychimo
100 Facts About The SS Baychimo
The Ghost Ship That Wouldn't Sink
COMING SOON
100 Facts About The Kaz II
100 Facts About The Kaz II
Drifting With No Crew
COMING SOON
100 Facts About The Indus Valley Civilization
100 Facts About The Indus Valley Civilization
Millions Left No Trace
COMING SOON
100 Facts About The Minoans
100 Facts About The Minoans
Europe's First Civilization
COMING SOON
100 Facts About Cahokia
100 Facts About Cahokia
North America's Lost Metropolis
COMING SOON
100 Facts About The Khmer Empire
100 Facts About The Khmer Empire
Swallowed by the Jungle
COMING SOON
100 Facts About The Cochno Stone
100 Facts About The Cochno Stone
Scotland's Unreadable Stone Map
COMING SOON
100 Facts About The Franklin Expedition
100 Facts About The Franklin Expedition
Ice Defeated Britain
COMING SOON
100 Facts About The Flannan Isles Lighthouse
100 Facts About The Flannan Isles Lighthouse
Keepers Who Vanished
COMING SOON
100 Facts About Percy Fawcett
100 Facts About Percy Fawcett
The Jungle Kept Him Forever
COMING SOON
100 Facts About The USS Cyclops
100 Facts About The USS Cyclops
Vanished Without a Trace
COMING SOON
100 Facts About The Anasazi
100 Facts About The Anasazi
The Cliff Builders That Moved On
COMING SOON
100 Facts About Linear A
100 Facts About Linear A
The Script No One Can Crack
COMING SOON
100 Facts About The Dorabella Cipher
100 Facts About The Dorabella Cipher
Elgar's Secret Message
COMING SOON
100 Facts About The Beale Ciphers
100 Facts About The Beale Ciphers
Millions Hidden Behind Code
COMING SOON
100 Facts About The Circleville Letters
100 Facts About The Circleville Letters
Terror From an Anonymous Pen
COMING SOON
100 Facts About The Taman Shud Case
100 Facts About The Taman Shud Case
The Mystery Man of Somerton Beach
COMING SOON
100 Facts About The Amber Room
100 Facts About The Amber Room
Looted and Never Found
COMING SOON
100 Facts About The Beale Treasure
100 Facts About The Beale Treasure
Millions Still Waiting Underground
COMING SOON
100 Facts About Yamashita's Gold
100 Facts About Yamashita's Gold
Treasure Hunters Still Digging
COMING SOON
100 Facts About The Lost Dutchman Mine
100 Facts About The Lost Dutchman Mine
Arizona's Endless Hunt
COMING SOON
100 Facts About The Copper Scroll Treasure
100 Facts About The Copper Scroll Treasure
Ancient Wealth Still Hidden
COMING SOON
100 Facts About The Yonaguni Monument
100 Facts About The Yonaguni Monument
Japan's Submerged Enigma
COMING SOON
100 Facts About Pavlopetri
100 Facts About Pavlopetri
Ancient Streets Beneath the Sea
COMING SOON
100 Facts About Dwarka
100 Facts About Dwarka
India's Sunken Sacred City
COMING SOON
100 Facts About The Rongorongo Script
100 Facts About The Rongorongo Script
Easter Island's Unbreakable Code
COMING SOON
100 Facts About Heracleion
100 Facts About Heracleion
Egypt's Drowned Gateway
COMING SOON
100 Facts About Derinkuyu
100 Facts About Derinkuyu
The City Under the City
COMING SOON
100 Facts About Cappadocia
100 Facts About Cappadocia
City of Tunnels and Secrets
COMING SOON
100 Facts About The Sannikov Land
100 Facts About The Sannikov Land
The Island That Disappeared
COMING SOON
100 Facts About The Tunguska Event
100 Facts About The Tunguska Event
Explosion With No Crater
COMING SOON
100 Facts About The Catacombs of Paris
100 Facts About The Catacombs of Paris
Skulls and Bones Beneath the City of Light
COMING SOON
100 Facts About The Roman Dodecahedra
100 Facts About The Roman Dodecahedra
Relics Rome Never Mentioned
COMING SOON
100 Facts About The Antikythera Mechanism
100 Facts About The Antikythera Mechanism
Ancient Tech Too Advanced
COMING SOON
100 Facts About The Lycurgus Cup
100 Facts About The Lycurgus Cup
The Cup That Changes Color
COMING SOON
100 Facts About The Phaistos Disc
100 Facts About The Phaistos Disc
Minoan Message No One Can Read
COMING SOON
100 Facts About The Map of the Creator
100 Facts About The Map of the Creator
The Stone That Rewrites History
COMING SOON
100 Facts About Amelia Earhart's Disappearance
100 Facts About Amelia Earhart's Disappearance
The Flight That Failed the Dream
COMING SOON
100 Facts About D.B. Cooper
100 Facts About D.B. Cooper
A Ghost in the Sky
COMING SOON
100 Facts About Jimmy Hoffa's Disappearance
100 Facts About Jimmy Hoffa's Disappearance
America's Most Famous Missing Body
COMING SOON
100 Facts About The Princes in the Tower
100 Facts About The Princes in the Tower
Vanished for a Throne
COMING SOON
100 Facts About The Sodder Children
100 Facts About The Sodder Children
The Fire That Left No Graves
COMING SOON
100 Facts About The Vatican Secret Archives
100 Facts About The Vatican Secret Archives
History Behind Locked Doors
COMING SOON
100 Facts About The Beaumont Children
100 Facts About The Beaumont Children
Australia's Unsolved Beach Vanishing
COMING SOON
100 Facts About The Overtoun Bridge
100 Facts About The Overtoun Bridge
Where Dogs Leap to Death
COMING SOON
100 Facts About The Oakville Blobs
100 Facts About The Oakville Blobs
When It Rained Mystery
COMING SOON
100 Facts About The Greenbrier Bunker
100 Facts About The Greenbrier Bunker
Cold War Worries
COMING SOON
100 Facts About The Death of Edgar Allan Poe
100 Facts About The Death of Edgar Allan Poe
Missing for Four Days
COMING SOON
100 Facts About The Max Headroom Broadcast Intrusion
100 Facts About The Max Headroom Broadcast Intrusion
TV Hijack That Stunned America
COMING SOON
100 Facts About The Black Dahlia
100 Facts About The Black Dahlia
Broken Hollywood Dream
COMING SOON
100 Facts About The Death of Elisa Lam
100 Facts About The Death of Elisa Lam
Elevator to Nowhere
COMING SOON
100 Facts About The Death of William Desmond Taylor
100 Facts About The Death of William Desmond Taylor
The Director's Last Scene
COMING SOON
100 Facts About The Nazi Gold Train
100 Facts About The Nazi Gold Train
The Golden Myth
COMING SOON
100 Facts About Operation Bernhard
100 Facts About Operation Bernhard
The Audacious Pound Plot
COMING SOON
100 Facts About The Quedlinburg Treasures
100 Facts About The Quedlinburg Treasures
Masterpieces Stolen in War
COMING SOON
100 Facts About Göring's Art Hoard
100 Facts About Göring's Art Hoard
Looting Europe's Soul
COMING SOON
100 Facts About The Merkers Mine
100 Facts About The Merkers Mine
The Nazi Gold Vault
COMING SOON
100 Facts About The Hope Diamond
100 Facts About The Hope Diamond
The Curse in Blue
COMING SOON
100 Facts About The Crying Boy Paintings
100 Facts About The Crying Boy Paintings
Surviving the Inferno
COMING SOON
100 Facts About The Dybbuk Box
100 Facts About The Dybbuk Box
The Cabinet of Misfortune
COMING SOON
100 Facts About The Delhi Purple Sapphire
100 Facts About The Delhi Purple Sapphire
Fortune's Dark Jewel
COMING SOON
100 Facts About The Basano Vase
100 Facts About The Basano Vase
Silver Vessel of Doom
COMING SOON
100 Facts About The Ark of the Covenant
100 Facts About The Ark of the Covenant
Sacred Treasure Hunted Forever
COMING SOON
100 Facts About The Holy Grail
100 Facts About The Holy Grail
The Quest for Eternity
COMING SOON
100 Facts About The Shroud of Turin
100 Facts About The Shroud of Turin
Image Science Can't Explain
COMING SOON
100 Facts About The Spear of Destiny
100 Facts About The Spear of Destiny
Lance of Divine Power
COMING SOON
100 Facts About The Lost Tablets of Gilgamesh
100 Facts About The Lost Tablets of Gilgamesh
Epic Older Than the Bible
COMING SOON
100 Facts About The Lost Roman Legion
100 Facts About The Lost Roman Legion
Rome's Vanished Ninth
COMING SOON
100 Facts About The Dancing Plague of 1518
100 Facts About The Dancing Plague of 1518
When a Town Danced For Weeks
COMING SOON
100 Facts About The Wow! Signal
100 Facts About The Wow! Signal
Echo of Extraterrestrial Contact
COMING SOON
100 Facts About The Taos Hum
100 Facts About The Taos Hum
Mystery Sound Heard by Few
COMING SOON
100 Facts About The Green Children of Woolpit
100 Facts About The Green Children of Woolpit
Medieval Tale of Strangers
COMING SOON