I have read several reviews that the debut novel Swamplandi by Karen Russell is very good.
The Bigtree alligator wrestling dynasty is in decline—think Buddenbrooks set in the Florida Everglades—and Swamplandia!, their island home and gator-wrestling theme park, is swiftly being encroached upon by a sophisticated competitor known as the World of Darkness. Ava, a resourceful but terrified twelve, must manage seventy gators and the vast, inscrutable landscape of her own grief. Her mother, Swamp landia!’s legendary headliner, has just died; her sister is having an affair with a ghost called the Dredgeman; her brother has secretly defected to the World of Darkness in a last-ditch effort to keep their sinking family afloat; and her father, Chief Bigtree, is AWOL. To save her family, Ava must journey on her own to a perilous part of the swamp called the Underworld, a harrowing odyssey from which she emerges a true heroine.