Titles: The Aeronaut’s Windlass (1), Warriorborn (1.5), The Olympian Affair (2)
Author: Jim Butcher
Publication Dates: Sep. 2015, Sep. 2023, Nov. 2023
I have been a fan of Jim Butcher for a while. I love Dresden Files and the Codex Alera and I have waited eight freaking years for the second book in the Cinder Spire series. Eight years! I had to reread the first book when the second one was released because it had been a while.



Aeronaut’s Windlass Synopsis: Since time immemorial, the Spires have sheltered humanity. Within their halls, the ruling aristocratic houses develop scientific marvels, foster trade alliances, and maintain fleets of airships to keep the peace.
Captain Grimm commands the merchant ship Predator. Loyal to Spire Albion, he has taken their side in the cold war with Spire Aurora, disrupting the enemy’s shipping lines by attacking their cargo vessels. But when the Predator is damaged in combat, Grimm joins a team of Albion agents on a vital mission in exchange for fully restoring his ship.
And as Grimm undertakes this task, he learns that the conflict between the Spires is merely a premonition of things to come. Humanity’s ancient enemy, silent for more than ten thousand years, has begun to stir once more. And death will follow in its wake…
Warriorborn Synopsis: Benedict Sorellin-Lancaster hasn’t even broken in his lieutenant’s insignia when he’s summoned to meet with the Spirearch of Spire Albion himself for a very special—and very secret—purpose. The Spirearch needs Benedict to retrieve a bag he’s “misplaced” on the Colony Spire known as Dependence, which has strangely cut off all contact with the outside world. It’s a delicate mission at best, a potential bloodbath at worst.
To this end, the Spirearch has supplied Benedict with backup in the form of three Warriorborn. But unlike the courageous lieutenant, this trio has formerly used its special gifts for crime, carnage, and outright bloody murder. And all of them were caught and imprisoned because of Benedict. Now, if they behave—and make it back alive—they’ll go free.
But when the odd squad reaches Dependence, they soon discover something waiting for a horrific weapon that could shatter the balance of power among the Spires. And Benedict will have to bring his own Warriorborn skills to bear if he, his team, and Spire Albion are to have any hope of survival . . .
Olympian Affair Synopsis: For centuries the Cinder Spires have safeguarded humanity, rising far above the deadly surface world. Within their halls, aristocratic houses rule, developing scientific marvels and building fleets of airships for defense and trade.
Now, the Spires hover on the brink of open war.
Everyone knows it’s coming. The guns of the great airship fleets that control the skies between the last bastions of humanity will soon speak in anger, and Spire Albion stands alone against the overwhelming might of Spire Aurora’s Armada and its new secret weapon–one capable of destroying the populations of entire Spires.
A trading summit at Spire Olympia provides an opportunity for the Spirearch, Lord Albion, to secure alliances that will shape the outcomes of the war, and to that end he dispatches privateer Captain Francis Madison Grimm and the crew of the AMS Predator to bolster the Spirearch’s diplomatic agents.
It will take daring, skill, and no small amount of showmanship to convince the world to stand with Spire Albion–assuming that it is not already too late.
Trigger warning for this series, there is death by explosions, swords, falling a long way, severe injuries caused by fights with people and creatures. Several years (2019) ago I did review The Aeronaut’s Windlass on its own but it has been a while and I think that series context make the story better because there is more of it.
The best way to describe this series is steampunk with monsters. Also, cats play a critical role and they are more proud than any other character in the whole series. I love them. This is a series where there are typically three plot lines running simultaneously. Typically it’s two for the protagonists and one for the antagonists. There are new characters in each book but the primary cast is the same throughout the series (so far).
Book one does the heavy lifting on the world building in addition to letting readers know the lengths that the characters from various spires will go to to get things done. The novella and book two begin two years after the events of book one. The novella really displays what warriorborn are capable of and why most have a respectful fear of them. It also makes the relationship between Benedict and Bridget so much sweeter.
Gwen is now the second officer to Captain Grimm on Predator. In book one it is quickly learned by characters and readers alike than Gwen is a force to be reckoned with while she has plenty to learn still there are some moments when she is given free reign to do what she does best and they are great. Captain Francis Madison Grimm is always asked to do the near-impossible. The Spirearch does get him and his ship into these situations but honor and doing what is right make demands on him more than any man can.
In the first book everyone learns that Cavendish is terrifying. Book two really just reinforces that idea. Also, the Spirearch of Aurora is not an honorable man when it comes to war. The novella and book two do get a bit spicy, nothing overly explicit but it is quite clear what is going on.
I suggest these books for fans of Jim Butcher, fans of steampunk, and fans of fast paced stories with lots of fantastic and terrifying creatures. If I have to wait 8 years for the next one after that cliff hanger I’m going to be upset, that’s not to say that other plot points weren’t wrapped up nicely. Have you read this series? Let me know in the comments, happy reading.
See my other Jim Butcher reviews here:
- Battle Ground – Latest in the Dresden Files series
- Peace Talks – Book before Battle Ground
- First Lord’s Fury – Final Book in the Codex Alera series

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