Anway, WTDD takes place five years after the Posleen invasion of Earth which happened in Gust Front. All three books are fast moving and exhibit a good sense of humor. For example, there were a couple of references to Army of Darnkness in WTDD. The military aspects of the novels seem to be accurate, which only makes sense as Ringo is a vet of the 82nd Airborne. As a gunnut, I appreciate that for the most part the firearms-related content, of which there's a lot, is generally accurate. There's the occasional blooper, as when Ringo notes that one character's Walther PP is chambered for 7.62mm rounds, when it should say 7.65mm. Close enough for fiction. But one thing I really liked was this little missive from his character Wendy Cummings, given to some new shooters:
The most important thing is that; never, ever point a gun, even an "unloaded" gun, at anything you don't want destroyed. For the purposes of safety, every gun is loaded. Guns aren't evil magic; they're just tools for killing something at a distance. Treat them as useful, but dangerous tools, like a circular saw or a chainsaw, and you'll be fine.
That right there is the essence of firearms safety.
I'm enjoying the Human-Posleen War series a lot. Between it and Eric Flint's 1632, I've been devouring scifi like I haven't done since before I started my first term of law school. So, tonight I'll be ordering Hell's Faire, the next Ringo book, 1633, and The Watch on The Rhine.