haven't read them, or seen the film myself.
but the title rattled around in my head with all the publicity about russian forces having a "Z" painted on them.
that, and it's a war against zombies (who aren't using their brains)
the book is in 5 chapters:
Warnings
Blame
The Great Panic
Turning the Tide
Good-Byes
Video of Russia soldiers linking hands with civilians and forming a Z:
https://gettr.com/post/p105ms009b1