Promise of Blood is excellent, if you like alternative history with a touch of the fantastical. I'd definitely recommend it, as I did above

Of course, tastes vary, and admittedly it is a bit hard in the beginning as he's quite detailed in his weaving of the world, and it starts
In Media Res. But I've found the whole series gripping.
The first is the Powder Mage Series, by Brian McClellan. It starts with A Promise of Blood

The Age of Kings is dead . . . and I have killed it.
It's a bloody business overthrowing a king...
Field Marshal Tamas' coup against his king sent corrupt aristocrats to the guillotine and brought bread to the starving. But it also provoked war with the Nine Nations, internal attacks by royalist fanatics, and the greedy to scramble for money and power by Tamas's supposed allies: the Church, workers unions, and mercenary forces.
It's brilliantly paced, with visceral battle scenes that other than the presence of the Powder Mages and other Magic are very well done, and might as well be right out of a Sharpe novel, and well written characters that are intelligently developed.
-wraith808