David’s in depth and fantastically organized assortment of audio teachings can be found at acim.me. The e book is divided into 3 sections: the Text, the Workbook, along with the Handbook for Lecturers. All are overflowing with practical spiritual wisdom. Still the "engine place" from the Course is its day-to-day https://awakening-mind.org/resources/a-course-in-miracles/