YMMV / Dune Encyclopedia

• Fanon Discontinuity: Subject of this a lot, fans tend to fall into three groups.
  • Fans that take the Encyclopedia as canon or sub-canon for gaps the books don't cover, citing that it was published as an authorized companion book and endorsed by Frank Herbert.
  • Fans that do not consider it canon, agreeing with the attempted Canon Discontinuity issued by Brian Herbert and preferring the prequels (which contradict the back-stories the Encyclopedia gives).
  • Fans that only consider the original six books by Frank Herbert as canon and exclude both the encyclopedia and prequels.