The Jelly Bean Scheme — Cynthia Blair

A voodoo priestess, a pirate's treasure map, a new friend's unexplained disappearance… When Chris and Susan Pratt travel to colorful New Orleans for a history competition, they find themselves embroiled in another thrilling adventure. Will the fearless twins' cleverness -- and their love of jelly beans -- help solve another mystery? 11th of the Pratt twin series. Young adult fiction by Cynthia Blair; originally published by Fawcett Juniper