Beautifully - and I mean beautifully - written at times but I wonder if the protagonist doesn't venture into Bella/Twilight territory: a wistful, free, wild, mysterious and self absorbed (despite numerous justifications emitted by the author) who is nonetheless pursued and desired by men and is the center of fascination and stuff of legend to the (mostly) ignorant townsfolk.
I didn't care much about either twist/reveal by the time I got to the end (one in particular disappointed me: it'll be cheered by feminist but I wanted The Marsh Girl to be more clever than that).
Regardless I read it while vacationing along the Mississippi in my hometown and enjoyed the sights and sounds of the Carolina marsh county painted by the author.