Hi Claire,
I've heard of A Course in Miracles - I remember my mother went to a seminar series on it a number of years ago at Queens University in Belfast (extra-mural department) when she was still teaching Philosophy of Mind before she retired. I could probably get a copy of it off her. How have you found it?
There are incidentally two recent books that I would recommend myself, particularly for anyone particularly interested in the concept of cultivating presence in the "now". The first is "Practising the Power of Now" by Eckhart Tolle. The second is "Awareness" by Anthony de Mello.