I actually liked the first book, but this one is annoying the heck out of me. The characters are interesting, but the steady goofs, mistakes, and oversights keep breaking my immersion, and I've lost interest in reading it.
For example:
(Some might say these are spoilers, but they're minor spoilers at most, and all early in the book.)
Radiation can't be stopped by ordinary plastic garbage bags, and can't be "precipitated" out by rain. Radiation is the energy emitted by a radioactive substance or a nuclear reaction. Like other electromagnetic radiation, it travels at the speed of light, and goes right through most ordinary substances because of its high energy. From the descriptions, I think Smith actually means radioactive fallout, but he keeps calling it just radiation, and it's distracting.
You can't hear a crack and a boom of thunder from the same stroke of lightning. Smith describes it as "he heard the crack, then the boom of thunder", implying they're both from the same strike. But it doesn't work that way. If it's close, it cracks, if it's distant it booms and rumbles, and you can only hear one from a given stroke of lightning.
Feeding bone-in chicken wings to a dog (as the main character does because he doesn't feel like eating the dinner he's holding) would almost certainly kill the dog. The bones would break and splinter as the dog eats them, and almost certainly puncture its stomach and intestine. The dog would then die of peritonitis in the setting of the story, but only after days of agony and suffereing. I didn't read far enough to see if this happens, but whether it's the character's ignorance or the author's, it's unacceptable.
A firefighter's protective jacket is a turnOUT coat, not a "turncoat". A turncoat is a traitor.
While most of these seem trivial when taken individually, they are constant irritations that keep interrupting my reading, and make the story not worth my time. Moving on, don't plan to read any more of the series.