Mary Pope Osborne continues her winning streak with this diverting (and educational) Magic Tree House excursion to New Orleans. On their latest goodwill mission, Jack and Annie encounter some major Big Easy presences, including some real ghosts and a young trumpet player named Louis Armstrong!Mary Pope Osborne continues her winning streak with this diverting (and educational) Magic Tree House excursion to New Orleans. On their latest goodwill mission, Jack and Annie encounter some major Big Easy presences, including some real ghosts and a young trumpet player named Louis Armstrong!