Says the Dallas Morning News:
"If Stephen King were to try his hand at science fiction, he'd be lucky to be half as entertaining as John Scalzi."Wow, where to begin?
First off, "If" Stephen King wrote science fiction? I'm pretty sure I could make a compelling argument that ALL he writes is some type of science fiction, but at least we can agree on The Running Man, The Long Walk, The Dark Tower, THE STAND, even The Tommyknockers and I haven't even touched his short stories. I'm sure plenty have a much stricter definition of science fiction than I do, but even so, something of King's would probably fit.
Wikipedia, bastion of wisdom that it is, literally says, "Stephen Edwin King (born September 21, 1947) is an American author of contemporary horror, suspense, science fiction!, and fantasy." (emphasis and exclamation mark added)
Sadly, if you know anything at all about science fiction, you immediately discern that the Dallas Morning News knows nothing about it. Whoever wrote it went, "well, I know Stephen King writes lots of stuff..." ...and that's about the extent to which this person thought through this comparison.
I'm not quite sure what they're going for either, but I think it's that Scalzi is a pretty hilarious writer and entertaining in a comical way, which Stephen King does not attempt to be at least as far as I've experienced...so that doesn't quite fit either. They're like night and day comparisons here.
I'm also sure that whoever included the quote on the back of the book thought, "well the quote does positively compare the author to Stephen King, so that obligates us to put it on the book."
This reminds me I need to read more Scalzi, but probably not for any possible connection to Stephen King. :)