Nope, you wont find Lucasarts on everything star wars. What you are thinking of is Lucasfilm LTD. They are the ones that control everything star wars (as well as Indiana Jones and a few others). There are divisons inside of Lucasfilm such as Lucasarts (video games), Lucas Licensing (Toys), and Lucas Books (of course, books). Now they all run and make their own decisions for the most part, usually have other companies do most the stuff (Hasbro and Del Rey). Rarely do they have to get every little thing approved by Lucasfilm LTD (that is what the divisions are for), they just put the stamp of approval on it. Everything clearer?