There's an interesting article here
that addresses (AGAIN) the ongoing troubles
with Joyce copyright, particularly as involves
Stephen Joyce. Excerpt below:

In 1994, Stephen learned that Carol Shloss, an
English professor at Stanford, was working on a
biography of James Joyce's mentally ill daughter -
Stephen's aunt Lucia - who died in 1982. Shloss
was exploring the theory that there was a link
between Lucia's madness and the language of
Finnegans Wake - and was also probing possible
unsavoury explanations for Lucia's condition.