Dr. Helen Schucman was the channel for A Course in Miracles. Dr. Bill Thadford, her colleague at Columbia University, typed all of Dr. Schucman's notes, held her hand to reassure her and overall did everything that was needed to bring A Course of Miracles to the world.
This is an amazing story of Helen and Bill and how A Course of Miracles came to be.
Earlier I posted Helen's autobiography. Here is Bill's.
You can also read the autobiography and download it from the Foundation for Inner Peace where the daily lessons are posted and an audio version provided as well, along with other valuable information about the Course.