I truly enjoyed the book I read that attempted to document every single death I and around the Grand Canyon. Hopefully it's still on the shelves of the bookstore there.
If you hang out on the rim remember that you can't sue the manucturer if you or your loved ones find out that the big hole in the ground can cause gravity poisoning if you fall. If you take the trails down from the rim bring water and be very conservative about your abilities, energy levels and so on. Leave the wildlife alone.
It was awesome each time I've been and I hope to go back again.