Elabon
- Wereblood (1979) ... using Eric Iverson pseudonym
- Werenight (1979) ... using Eric Iverson pseudonym
- Werenight (revised edition, 1994)
- Prince of the North (1994)
- Wisdom of the Fox (1999, collects the revised Werenight and Prince of the North)
- King of the North (1996)
- Fox and Empire (1998)
- Tale of the Fox (2000, collects King of the North and Fox and Empire)
The Videssos Books
Fantasy series about a world that is analogous to the Byzantine Empire.
- The Videssos cycle
- The Misplaced Legion: One of Julius Caesar's legions is transported to a world with magic. (1987)
- An Emperor for the Legion (1987)
- The Legion of Videssos (1987)
- The Swords of the Legion (1987)
- The Tale of Krispos Series
- Krispos Rising (1991)
- Krispos of Videssos (1991)
- Krispos the Emperor (1994)
- The Time of Troubles Series
- The Stolen Throne (1995)
- Hammer and Anvil (1996)
- The Thousand Cities (1997)
- Videssos Besieged (1998)
- The Bridge of the Separator (2005)
Worldwar & Colonization Series
Science Fiction/Alternate History ... Aliens invade in the middle of World War II
- Worldwar Tetralogy
- In the Balance (1994)
- Tilting the Balance (1995)
- Upsetting the Balance (1996)
- Striking the Balance (1996)
- Colonization Trilogy
- Second Contact (1999)
- Down to Earth (2000)
- Aftershocks (2001)
- Homeward Bound (2004)
The Southern Victory or Timeline-191 Series
Alternate History ... The South has won the American Civil War; this posits what would then happen over the next century. (The series consists of several smaller series and has no official title)
- How Few Remain (1997)
- The Great War Trilogy
- American Front (1998)
- Walk in Hell (1999)
- Breakthroughs (2000)
- The American Empire Trilogy
- Blood and Iron (2001)
- The Center Cannot Hold (2002)
- The Victorious Opposition (2003)
- The Settling Accounts Tetralogy
- Return Engagement (2004)
- Drive to the East (2005)
- The Grapple (2006)
- In at the Death (2007)
Darkness Series
A fantasy series about a world war between nations using magic as weapons. Many of the plot elements are analogous to elements of World War II, with countries and technologies that are comparable to the events of the real world, while the writing style is similar to Timeline-191.
- Into the Darkness (1999)
- Darkness Descending (2000)
- Through the Darkness (2001)
- Rulers of the Darkness (2002)
- Jaws of the Darkness (2003)
- Out of the Darkness (2004)
War Between the Provinces Series
A reversed fantasy version of the American Civil War, set in a world where magic significantly works. The industrial-magical south is fighting the rural north over the blond serfs.
- Sentry Peak (2000)
- Marching Through Peachtree (2001)
- Advance and Retreat (2002)
Hellenic Traders Series
A historical fiction series about two cousins who are traveling merchants in the fourth century BC Mediterranean. The novels were written under the H.N. Turteltaub pseudonym.
- Over the Wine Dark Sea (2001)
- The Gryphon's Skull (2002)
- The Sacred Land (2003)
- Owls to Athens (2004)
Crosstime Traffic Series
This series is based on the premise that travel between parallel universes is possible. This is a series for young adults. Turtledove makes sure not to use any profanity or racial slurs in this series.
- Gunpowder Empire (2003)
- Curious Notions (2004)
- In High Places (2006)
- The Disunited States of America (2006)
- The Gladiator (2007)
- The Valley-Westside War (2008)
Days of Infamy series
In the
Days of Infamy series the Japanese gained the initiative in the Pacific War by invading and occupying Hawaii.
- Days of Infamy (2004)
- End of the Beginning (2005)
The Atlantis Series
A trilogy of books which describes a world where the American eastern coast from the tip of Florida to Nova Scotia breaks away from the mainland millions of years in the past and has an island biota similar to New Zealand's. Discovered in 1452 and named Atlantis, this eighth continent becomes a focal point in a gradually diverging timeline. Two short stories, "Audubon in Atlantis" and "The Scarlet Band" have been set in this milieu.
- Opening Atlantis (2007)
- The United States of Atlantis (2008)
- Liberating Atlantis (2009)
- Atlantis and Other Stories (2010) - Collects Audubon in Atlantis" and "The Scarlet Band".
Opening Atlantis was nominated for the 2009 Prometheus Award.
Opening of the World
A trilogy of books describing a fantasy world in which inhabitants of an Iron Age empire explore a land uncovered by a receding glacier
- Beyond the Gap (2007)
- Breath of God (2008)
- The Golden Shrine (2009)
The War That Came Early
A series describing an alternate World War II which begins in 1938 over Czechoslovakia. The number of volumes has not been set. The first volume,
Hitler's War, was released in hardcover in 2009 without a series title. Subsequently, the paperback edition was announced as
The War That Came Early: Hitler's War. As of this writing, six total volumes have been contracted for.
- Hitler's War (2009); to be published in paperback as The War That Came Early: Hitler's War (2010).
- The War That Came Early: West and East (2010)
- The War That Came Early: The Big Switch (no date announced)
- Volume IV
- Volume V
- Volume VI
Stand-alone Books
- The Chronicle of Theophanes, Harry Turtledove editor and translator, University of Pennsylvania Press, 1982. A translation of an important Byzantine historical text, completed soon after Harry Turtledove's PhD studies.
- Agent of Byzantium (1987) ... Imperial Byzantine special agent Basil Argyros is sent on various missions in an alternate universe where Muhammad became a Christian saint and consequently the Byzantine Empire never fell.
- A Different Flesh (1988) ... a related set of short stories spanning the 17th to 20th centuries set in a universe where the ancestors of the Native Americans never crossed into the New World, only Homo erectus.
- Noninterference (1988) ... A human interstellar survey team violates a directive to avoid interference with alien civilizations, with disastrous long-term consequences.
- Kaleidoscope (1990) ... short story collection
- A World Of Difference (1990) ... In this alternative history story, the 4th planet of our solar system is larger and named Minerva instead of Mars. The Viking space probe of the 1970s sends back one picture ... that of an alien creature swinging a stick ... before losing contact. A USA mission and a USSR mission are sent to explore the planet; these two missions start separately but later have to cooperate.
- Earthgrip (1991)
- The Guns of the South (1992) Science Fiction/Alternate History ... The Confederate Army is supplied with AK-47's by time travelling members of the Afrikaner Weerstandsbeweging from the early 21st century.
- The Case of the Toxic Spell Dump (1993) ... EPA agent David Fisher battles displaced magical powers in a very creative sorcerous equivalent to late-20th century Los Angeles. He follows the evidence to a toxic spell dump, where dangerous remnants of industrial sorcery are stored.
- Departures (1993) ... short story collection
- Down in the Bottomlands (1993) ... At the end of the Miocene period, the Mediterranean Sea stays dry to the present day. The dry sea basin is a large canyon containing a national park, and the hero must race to stop villains from letting in the Atlantic and flooding the area.
- The Two Georges (1995) Alternate History/Mystery, co-authored with Richard Dreyfuss ... Set in the year 1996 of an alternate timeline where the American Revolution was peacefully avoided. The painting that symbolizes the union between North America and Britain is stolen by terrorists, and officers of the Royal North American Mounted Police must find it before it is destroyed.
- Thessalonica (1997) ... Early Christians in the Greek city of Thessalonica deal with barbarian invaders on both a physical and metaphysical level.
- Between the Rivers (1998) ... Taking place in an equivalent to ancient Mesopotamia, city-states ruled by different gods fight for dominance.
- Justinian (1998) ... Fictionalized account (with some speculation involved) of the life of the Byzantine Emperor Justinian II...using H.N. Turteltaub pseudonym
- Household Gods (1999) ... co-written with Judith Tarr Science Fiction/Alternate History ... A modern lawyer finds herself in the Roman Empire of Marcus Aurelius.
- Counting Up, Counting Down (2002) ... short story collection
- The Daimon (2002) - A novella included in the alternate history collection Worlds That Weren't. It describes a world where the Greek philosopher Socrates aids the Athenian general Alkibiades in defeating the Spartans, allowing him to unite the city-states of ancient Greece and contemplate war on the Persian Empire.
- Ruled Britannia (2002) Alternate History ... The Spanish Armada conquers England and forces Shakespeare to write a play about Philip II. At the same time he is secretly writing a play for the English underground resistance about Boudica's rebellion, with Boudica meant to be analogous to the imprisoned Elizabeth I.
- In the Presence of Mine Enemies (2003) Alternate History ... Follows the struggles of a family of secret Jews in Berlin two or three generations after a Nazi victory in World War II. The events in the story follow a common theme of Turtledove's work, transplanting one set of historical events into another setting (the most prominent example being Timeline-191 moving European history onto the American continent). In this case, the decline of the Soviet Union in the 1990s is translated to the Third Reich in the 21st century (and the secret Jews' way of life is reminiscent of Marranos in Spain).
- Conan of Venarium (2004) a tale set in the youth of Robert E. Howard's Conan the Barbarian.
- Every Inch a King (ISFiC Press) (2005) An acrobat becomes king of a small country. Although set in a fantasy world, it is analogous to the real world, this time in the Balkans, between the first and second Balkan War. Shqiperi is modeled on Albania, and the story itself is modeled on the story of Otto Witte.
- Fort Pillow (2006) - Historical retelling of the Battle of Fort Pillow.
- The Man with the Iron Heart (2008) - Reinhard Heydrich survives an assassination in Czechoslovakia by partisans and later goes on to lead an insurgent movement against the allied occupation of Germany. This is another historical transplant, in this case the Iraqi insurgency of 2003 is transplanted to postwar Germany.
- After the Downfall (2008) - A Wehrmacht officer is transported into a fantasy world during the Russian invasion of Germany at the end of World War II.
- Reincarnations (2009) - A limited edition hardcover containing eight stories, including six never before reprinted and one original story.
- Give Me Back My Legions! (2009) - A historical novel detailing the events leading up to the Battle of the Teutoburg Forest, as well as the battle itself.
Web Publishing
- Winter of Our Discontent: The Impeachment and Trial of John F. Kennedy (2007) - Co-written with TV series creator Bryce Zabel. After John Kennedy survives the attack at Dealey Plaza unharmed, the resulting investigation sets events in motion that tear apart his administration. (First three chapters only, plus commentary)