Foucault on the self

Hello,

Sorry to post such a simple-minded question to the list,
but as a Foucault neophyte I would like to know whether
anyone can point me to the best place to learn Foucault's
views on the self -- what kind of thing it is (and isn't).
Is there a book, chapter, or article, by Foucault or
someone else, that summarizes this?

Thanks.

Bill Clark