I'm not sure on this season. Well at least they're going somewhat the novels are kinda heading except some major parts like:
Spoilers.. be warn son.
Rita not dead.
Deb knew Dex was a killer in the first book.
Brain isn't dead yet. Haven't read double dexter yet.
Doaks isn't dead... well half doesn't count.
Angel is a lab tech.
Lt. LaGuerta is dead.
and some minor points.
Overall.. i'm kinda psych for ep 2 of this season just because it's more realistic then deb's and dex's original conclusion in the first and second books.