A fairly good outing with the Realmgate Wars series, though this one tended to be a bit formulaic.
The plot of taking a Chaos held fortress because it has a realmgate, all the while fighting Skaven on your way there, running into a band of sketchy tribes people running from Chaos (always Khorne or Nurgle devotees), was a tad done to death by this point in the series.
The bit of a swerve was then having to defend the realmgate against a horde of daemons who pour forth from it, and then the fortress itself comes under siege from a massive Ork, er, I mean Orruks, warband.
Not enough variation from the rest of the series to stand out, but that's an issue of not properly thought through lore (not thought through long and hard enough, in my view) and a bit of a rush to get a series to print to support the tabletop.
That said, Matt Westbrook did a very good job with what he had to work with background and lore wise.
Thostos Bladestorm, one of the main heroes of the whole series, is handled splendidly here. And I like how his personality issue is finally resolved. That was well done. Matt also did a great job humanizing the Stormcast. No other author has made them down to earth before, and yet Matt had me actually chuckling at the humor he infused in the story.
There was also a hint of actually thinking through the tactics of the battles, kind of rare in more recent BL publications.
All in all, while the plot was formulaic, the execution of the story more than made up for it.
If Matt were to write more of the Celestial Vindicators, I would read.
Not great, but good.