I read this book and really enjoyed it.
Way Of Aikido
by George Leonard
I found it had a great way to visualize things like stress and greif and deal with them. I haven't tried it with greif yet but as far as stress goes I've tried some of the excersise's in the book and was shocked at how it completly removed the stress I was dealing with. I think it would do well with greif as well.
It may not be the ideal choice in reading when it comes to dealing with greif but I think you might be surprised.