The Orchid Thief (Nancy Drew Girl Detective Series #19) in Bloomington, MN

Bess, George, and I are heading down to Key Largo, Florida, to enjoy some fun in the sun with my old friend, marine biologist Delia Duke. But it seems that Delia's state park is clouded over with mystery: Someone has been poaching the park's rare butterfly orchids. Their future depends on us!
George seems more interested in searching for treasure in the
Catalina
, an old sunken Spanish galleon, than in hunting for an orchid thief. My hope is that George, Bess, Delia, and I can save two priceless treasures in one fell swoop.