Lawrence Watt-Evans’ Above His Proper Station is the second half of A Young Man Without Magic. As you’d expect from the second half of a book, it picks up pretty much exactly where things left off, and continues forward from there.
I still haven’t read Sabatini, so am unable to compare it to its inspiration, but this definitely reads like one of those old-timey historical novels set in the French Revolution, which is fun. Watt-Evans remains an engaging writer, as always, and fantasy of manners turns out to be a good genre for him. I’d prefer if he wrote nothing but Ethshar novels (as I seriously love that puzzle fantasy genre and the world he created), but this is good stuff, too.