In a feature-length saga, Scrooge discovers Carl Barks’ “Golden River”... but is it cursed by a vengeful gnome? In “Boxing Donald,” our hero trains two rival prizefighters at once. Scrooge takes over Donald’s life in Freddy Milton’s “Mistaken Identity” — then battles manic coin collector Melvin X. Nickelby in Lars Jensen’s “Heads You Win, Tails You Bruise!” A new Don Rosa pin-up rounds out the book.