I'd suggest Designing Great Beers by Ray Daniels. It will give you a ton of history on individual beer styles as well as the breakdown on grain bills and extract used at whatever homebrew competition was going on the year he wrote it.
Then you don't have to depend on people to give you a clone recipe.
Have you had Trois Pistoles, Maudite, Terrible, Quelque Chose, or Chambley Noir from Unibroue? Or Delerium Nocturnum from Brouwerij Huyghe? How about Chimay Grande Reserve (blue label)? Those are all pretty good dark belgian style beers.