Volume 13. Action! Adventure! Romance! Mad Science!
Another year, another books, and once again, the plot rushes on with no concern for boundaries of covers. Well, almost none. It does take up after the cliff-hanger, and end on one humdinger of a cliff-hanger. So -- spoilers ahead for the earlier volumes!
It opens with the Castle being recharged with lightning strikes, and so moving against the Wulfenbach forces. Gil tries to save Agatha by kidnapping her before his father kills her. Franz stops him and takes him off, without hurting hm because Agatha tells Franz she's somewhat in love with him. Some tender moments between Zeetha and Higgs -- she's afraid he will be angry she's up and about after her injuries -- and a charge out of the city. Agatha undergoes Dark Rites at the cathedral because some are integral to protecting the world. The Baron decides to deal with a problem himself. And Tarvek's cousin Marcellus kidnaps Agatha because he needs her to pull off his Storm King stunt; difficult, but he does it, and drags her to a portal. Unfortunately, going through that -- interacts with the Baron's decision.
The rest involves a very vain reindeer clank, a surprising bundle of joy, a new jaeger general (no, not one of the ones we know of but haven't met), a weasel being very necessary for Agatha, a guard slime that is very confused by Agatha telling it she doesn't want it to obey, pig clanks with wings, loyal hounds, and much more.