Who was the director of the audiobook released August 31, 2009?
CREATE TABLE "external_links" (
  "title" text,
  "series" text,
  "release" text,
  "featuring" text,
  "writer" text,
  "director" text,
  "length" text,
  "timeline" text,
  "release_date" text
);
SELECT "director" FROM "external_links" WHERE "release_date"='August 31, 2009';