Not at all, without Michael's approval it has to be a fanwork. And JP still has copyright for a ton more years.
If he was alive, I heard he was making a third book, but don't quote me on that.
You built a time machine...Out of a DeLOREAN?
This signature was signed with Doc Brown's new Permanent Ink. If I make a screw up here, then it's gona stick. Oh crap, misspelled gonna!