This was pretty disappointing for me, as I was expecting more for some reason. The semi-recent Tor.com review of Costello's Wurm led me to reviews and online comments about Midsummer, which made it seem like balls-out, just-plain-fun horror, which was just what I was in the mood for.
And while the concept of an alien parasite from Antarctica making it's way to a small mountain town and slowly infecting everyone seemed fun, it jumped around way too much, as in every couple of pages we're in the head of a new character, many of whom are both uninteresting and unimportant to the overall story, but were included, I surmise, to pad out the length as was the custom during the post-King horror boom (and which probably contributed to the market's eventual collapse).
I wish the author would have focused the story around 13 year-old Josh, who's new in town and living with his grandmother, and Clara, his newfound tomboy friend, as this could have made for a great coming-of-age-type horror story. And those two were at least interesting. The last 1/3 of the novel, when the shit hits the proverbial fan, was pretty cool, but by that point I had long since stopped caring. Still, a decent book for it's type, though these types were a dime a dozen in the late 80s/early 90s.
2.5 Stars