the script is worth reading if you enjoy the crawley family and their staff.
the author, julian fellowes, or baron fellowes of west stafford dl, has included comments. they are notes on an actor's performance of a scene, a character's personality, or an aspect of the show (such as why the first episode opens with the titanic sinking).
one author's note explains that in season one episode three, when a turkish visitor dies in scandalous circumstances, some press said this was unbelievable. it's interesting to read julian's explanation of how the story line was rooted in reality.