Moira Noonan wrote a great book - “Ransomed from Darkness” about her escape from her deep involvement with New Age practices. She particularly mentioned the “Course in Miracles” that Oprah endorses. It is a heresy of the type that man is all good, there is no sinful fallen nature, and we can “discover” our own inner g_d. Noonan knows of what she writes. It is a fascinating read.
That's two great-sounding books I think I'm going to have to get!