This posted today on his FB page:

It is with the most profound sadness that I write to inform you that Jon died early this morning. He died at home, with me, as he had always wanted. His passing was unexpected and sudden. His heart just gave out.
Jon leaves behind a legacy that amazed and challenged and delighted magicians for many years. I hope that through his written works many magicians to come will also be enlightened by his insights.
Jon was that rare combination of brilliance, generosity, and humility. He will be missed more than I can say.

Jessica Hack

Jessica-

You, of course, have my condolences. Jon was one of the real thinkers and it was always a delightful challenge to talk with him.

A little over a year ago, I became a widower in much the same way. No warning. Maybe it's the best way to go. It takes time, but I promise you that it gets a little easier with the passage of time.

MJ

Rest in peace to another legend and prolific writer/thinker. His academic immersion into our world resulted in a legacy of contributions that few will parallel. I always enjoyed reading his works because he incorporated much more than just magical knowledge. He was clearly enamoured with life and all of its mysteries, and I'm sure his exploration will continue on the other side. My condolences to his family and friends.

Sorry to hear of your loss as well, MJ.

T.J.

Take some time and peruse his extensive catalog on lybrary.com so that you can add some of his choices and wisdom to your performances...