SPQR Books in Order
Part ofJohn Maddox Roberts Books in OrderSee the SPQR books in order by John Maddox Roberts, with quick summaries, series background, and where to start with Decius in ancient Rome.
Last updated: July 11, 2026
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SPQR books in publication order
13 books
The King's Gambit
by John Maddox Roberts
1990
When two seemingly unimportant murders are ignored by everyone else, Decius keeps digging. What he finds is a thick knot of corruption, blackmail, and political danger in the heart of the Roman Republic.
The Catiline Conspiracy
by John Maddox Roberts
1991
Rome is celebrating military success abroad while fear and bloodshed spread at home. Convinced a conspiracy is forming, Decius goes inside the plot and risks his life to stop the Republic from being torn apart.
The Sacrilege
by John Maddox Roberts
1992
A scandal at a sacred women's rite leads Decius into a case of disguise, class tension, and murder. To solve it, he has to work with a notorious criminal and follow the trail from Rome's gutters to its highest circles.
The Temple of the Muses
by John Maddox Roberts
1992
A trip to Alexandria should let Decius escape Rome for a while. Instead he finds philosophers, cultists, a dead courtesan, and a conspiracy with consequences larger than any ordinary provincial murder.
Saturnalia
by John Maddox Roberts
1994
Rome's wildest festival is in full swing when Decius is called home from exile to investigate a politically dangerous poisoning. The case leads him into family pressure, secret cults, and a city where rules have temporarily vanished.
Nobody Loves a Centurion
by John Maddox Roberts
1995
Sent to Caesar's army in Gaul, Decius is ordered to solve the murder of a despised centurion. With the wrong suspect already marked for death, he has very little time to find the real killer.
The Tribune's Curse
by John Maddox Roberts
1996
A tribune publicly curses Crassus on the day the army marches east, then is murdered soon after. Decius has to investigate in a Rome where politics, fear, and belief in old magic all point in different directions.
The River God's Vengeance
by John Maddox Roberts
1997
As aedile, Decius is supposed to stage games and keep the city running. A deadly tenement collapse puts him on the trail of greed and sabotage, and the deeper he digs, the closer the case gets to Rome's most powerful men.
The Princess and the Pirates
by John Maddox Roberts
2000
Sent to help suppress piracy, Decius heads to Cyprus and meets a young Cleopatra. When the island's ruler is murdered, trade, politics, and sea power tangle into a case far more dangerous than a simple anti-pirate patrol.
A Point of Law
by John Maddox Roberts
2001
Decius expects his rise to higher office to be routine until a stranger publicly accuses him of corruption. When the accuser turns up dead on the courthouse steps, Decius has to clear his name in a murder case designed to ruin him.
Under Vesuvius
by John Maddox Roberts
2001
Serving as praetor in Campania should be pleasant work for Decius and Julia. Then a priest's daughter is murdered near Vesuvius, a boy faces mob justice, and Decius has to cut through panic before the wrong person dies.
Oracle of the Dead
by John Maddox Roberts
2005
While visiting a famous southern Italian oracle, Decius stumbles into a feud between rival priesthoods. When the priests are slaughtered, old ethnic grudges and new ambitions threaten to turn one murder case into open violence.
The Year of Confusion
by John Maddox Roberts
2010
Caesar's calendar reform brings foreign astronomers to Rome, and then the killings start. Decius must protect the project, untangle fraud and superstition, and find a murderer before politics turns deadly.
SPQR books in chronological order

The King's Gambit
by John Maddox Roberts
1990SPQR, Book 1
The Catiline Conspiracy
by John Maddox Roberts
1991SPQR, Book 2
The Sacrilege
by John Maddox Roberts
1992SPQR, Book 3
The Temple of the Muses
by John Maddox Roberts
1992SPQR, Book 4
Saturnalia
by John Maddox Roberts
1994SPQR, Book 5
Nobody Loves a Centurion
by John Maddox Roberts
1995SPQR, Book 6
The Tribune's Curse
by John Maddox Roberts
1996SPQR, Book 7
The River God's Vengeance
by John Maddox Roberts
1997SPQR, Book 8
The Princess and the Pirates
by John Maddox Roberts
2000SPQR, Book 9
A Point of Law
by John Maddox Roberts
2001SPQR, Book 10
Under Vesuvius
by John Maddox Roberts
2001SPQR, Book 11
Oracle of the Dead
by John Maddox Roberts
2005SPQR, Book 12
The Year of Confusion
by John Maddox Roberts
2010SPQR, Book 13
Series background & context
At the center of the SPQR books is Decius Caecilius Metellus the Younger, a high-born Roman with good connections, bad habits, and a stubborn habit of asking questions powerful men would rather leave alone. He starts as a young aristocrat with a talent for trouble and grows, book by book, into a seasoned magistrate and investigator. The pleasure of the series is watching him work cases that look local at first and then open into much larger problems.
Rome is the real engine of these novels. Roberts gives you crowded streets, political canvassing, religious festivals, courts, gangs, noble houses, and the daily mess of a republic sliding toward collapse. Even when the crime is only one body in one alley, the investigation usually touches money, class, patronage, and the way power actually works. These are mysteries, but they are also books about the machinery of public life.
Decius is a good guide because he is both insider and nuisance. He belongs to one of the great families, so he can get into rooms that would stay closed to almost anyone else. At the same time, he is impulsive, curious, and not nearly as obedient as his elders would like. His voice keeps the books lively. He notices the absurd side of Roman politics without ever forgetting that people can end up dead for the wrong word or the wrong alliance.
The series does not stay in one place. Some books are rooted in Rome, while others send Decius to Alexandria, Gaul, Cyprus, Campania, and southern Italy. That travel keeps the background fresh and lets Roberts show how wide the Roman world had become, and how unstable it already was. Wherever Decius goes, local crime quickly meets imperial ambition.
These are brisk historical mysteries rather than slow academic reconstructions. The cases matter, the history matters, and the characters keep moving. If you like detective fiction with a strong setting, a dry sense of humor, and politics that feel alarmingly current, SPQR is very easy to fall into.
And hanging over all of it is the biggest long game of the series, the end of the Roman Republic. Decius can solve one murder at a time, but he cannot stop the world around him from changing.
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