There are 6 books in the Ministry of Peculiar Occurrences series. The newest book is Operation which came out in 2018.

There's something rotten in the city of London. Women are disappearing - young and old, rich and poor, from all walks of society. The only thing they have in common is their belief that women also deserve the vote. It's up to the Ministry of Peculiar Occurences to find out…

3
Dawn's Early Light

By Pip Ballantine , Tee Morris ,

Book cover of Dawn's Early Light
Working for the Ministry of Peculiar Occurrences, one sees innumerable technological wonders. But even veteran agents Braun and Books are unprepared for what the electrifying future holds in the third novel in the steampunk adventure series.

After being ignominiously shipped out of England following their participation in the Janus affair,…

4
The Diamond Conspiracy

By Pip Ballantine , Tee Morris ,

Book cover of The Diamond Conspiracy
For years, the Ministry of Peculiar Occurrences has enjoyed the favor of Her Majesty the Queen. But as agents Brooks and Braun soon learn in the fourth novel in the steampunk adventure series, even the oldest loyalties can turn in a moment…

Having narrowly escaped the electrifying machinations of Thomas…

5
The Ghost Rebellion

By Tee Morris , Pip Ballantine ,

Book cover of The Ghost Rebellion
From authors Pip Ballantine and Tee Morris, the award winning steampunk series continues. The chase is on! After rescuing Queen Victoria from the clutches of the Maestro, Agents Eliza D Braun and Wellington Books are in hot pursuit of Dr Henry Jekyll. While he continues his experiments on the aristocracy…

6
Operation

By Tee Morris , Pip Ballantine ,

Book cover of Operation: Endgame
One Final Mission. There is no time to rest for Eliza D Braun and Wellington Thornhill Books. The man who has haunted and hounded them since the fall of the Maestro—Doctor Henry Jekyll—is now on a killing spree, using bizarre, theatrical murders as a way to taunt their inability to…