BookWorm for the DS was released in (very) late 2009, it had a DSI release too, with contained more features. I currently owne a sealed version of this game. Lex, was given the sprite of Lex from BookWorm Adventures instead of the BookWorm Deluxe sprite. This game actually features local multiplayer, though, I'm not sure if it works on this eumlated version. PopCap was in the making of porting BookWorm Adventures to the DS, but was later cancelled. You can play the DS version of BookWorm below. (Rotate by 90 degrees in settings)