The Bigtrees’ story gains resonance, too, when we learn the Everglades’ history of governmental mishandling (the seeds of invasive melaleuca trees were sprinkled from airplanes in the 1940s) and environmental disaster at times the family’s stranded island stands in for the nation or even the planet. If Russell’s style is a North American take on magical realism, then her commitment to life’s nitty-gritties anchors the magic we are more inclined to suspend disbelief at the moments that verge on the paranormal because she has turned “Swamplandia!” into a credible world.

It’s easier to care about the pleasures and miseries of life in a failing gator park when we know how the father (the self-proclaimed Chief Bigtree) and his family ended up there, and are led to understand what goes into the routine of putting on death-defying shows every day. The setting and the sisters (Ava and Osceola, a k a Ossie) are the same, but they now benefit from a full back story. Vividly worded, exuberant in characterization, the novel is a wild ride: Russell has style in spades.

Now her fans can sink their teeth into her first novel, “Swamplandia!,” a sort of expansion of and sequel to that alligator story. Lucy’s Home for Girls Raised by Wolves,” with “Ava Wrestles the Alligator” leading a crazy procession of nine other Florida swampland stories, won her wide acclaim, and last year she was chosen one of The New Yorker’s “20 Under 40” top fiction writers. A few months later, Russell’s first story collection, “St. That story, “Ava Wrestles the Alligator,” featured a lusciously strange setting (an alligator theme park in the Everglades) and a tough young heroine with a dead mother and an absent father, as well as a weird problem: how to save her resented-yet-beloved older sister from eloping with a ghost.

In 2006, Zoetrope published a story by a 24-year-old writer, Karen Russell.

Swamplandia hbo