I read each title of the Michael McDowell's Southern Gothic Blackwater series individually.
There was not a weak point in the entire series. From the opening scene of Elinor's rescue in "The Flood" to the final dark scene in "Rain", McDowell stayed true to his theme.
I think it says a lot of a series when, finishing six books, you wish there was more. That is where I am with the Blackwater series.