Purgatory Key

After Lissa Rogers and Kendra Kozak set out on a summer adventure, the two teenagers arrive at Terrebonne Key, an island in the Louisiana bayou rumored to be the location of a legendary treasure. But they aren't alone on the island. Now dangerous fugitives are holding them hostage, and the girls' only hope for survival is investigator Del Shannon. When Del learns that Lissa is the granddaughter of her former mentor, Louise Lassiter, she decides...