How about developing the thesis statement after you have put together some body paragraphs? After writing 3 paragraphs about him, you will be better qualified to write a thesis argument.
King is different from other writers. Instead of writing with the end in mind, he thinks of a "what if" situation... like, what if all the cars, trucks, and machines took on minds of their own and started killing people.
For inspiration, read his book called
On Writing. It is part biographical. Your thesis must be specific and meaningful... like... "King says that he writes for the sake of writing, without any motivation to forward any particular theme (see
On Writing), but in actuality the theme of ________ is covered in a meaningful way in three of his novels."
Kevin, EssayForum.com