As good as Reckless.
Again there's a caper, but this time the setting is far more grim: a young woman named Dorotea, whose enslaved mother was freed by her white father, wants to claim her inheritance, but to do so she has to visit Saint Domingue, a sugar island where enslaved people are subject to the viciously cruel Code Noir. Dorotea enlists Jem to impersonate her, and from there the plot gets twistier and more suspenseful.
That description sounds as if one can expect a white-savior denouement -- for the avoidance of doubt, the resolution of Dorotea's inheritance and parentage issues turns out to be anything but. No spoilers; I'll just say that there's a reckoning to be had, and that I found it very satisfying not only for how the characters wound up but also for the way it addressed the story's historical context.
I've been thinking about how much I'd love to see more of Jem and Henry, but I keep bumping up against that exchange in the first book, in which they acknowledge that they're not likely to live long. That poignancy, that precarity, would be leached of its power if the lovers just kept on surviving caper after caper. At least, that's what I suspect would happen. Though if Jess Whitecroft writes it, I will for sure read it, in the complete faith that she'd avoid every pitfall.