So it turned out that the book "1635: The Eastern Front" was really a book cut in half. That explains some of its strange temperament. This is the other, longer half, and story threads are actually brought to some kind of conclusion, be what it may.

For that, I'm awarding it a bonus star. The main value of this book series remain as a thought experiment. What would modern technology, history, knowledge, religion and politics, and culture, do it transplanted into 1630. Is this a plausible series of events? Maybe. You make your own decision.
( )

This series continues, in an outstanding fashion, as Eric Flint creatively alters the political, business and social structure of the 17th Century. The volley gun, an archaic weapon even before this era assists the fabled Third Division in its role in maintaining the military balance of then Europe. Great characters, good and bad, at all levels, keep the narrative lively as plebians rise and the aristocracy totters. ( )

Stable writing as always of Flint, perhaps a bit long winded in places, as usual. The concept of the 1632 series is interesting and double up that because Flint has allowed it to grow into a shared universe. That allows for a real "world-buliding" on several conjectures and tangents not possible (or highly unlikely) for one person.
But the strength of 1632 is also its fate. As more and more of the 17th century is transformed by the "up-timers" it becomes less and less alternate history and more and more alternate contemporary.
But there is still a lot of good stories to write in there. ( )

Finally we're back to at least solid competence. This isn't a good book - I don't think more than one or two of the ten have been objectively good - but at least it's workmanlike and the plot moves along some. It will probably be the last one I actively seek out, because the conceit is wearing on me by now and the charmingly archetypal characters have become merely flat and predictable, but at least it leaves me on a relatively high note. ( )

With Emporer Gustav in a coma from his wounds the USE is on the brink of a civil war. A fast paced fun book. ( )