Ancient Myths and the New Isis Mystery, a collection of 7 lectures (plus an additional one from 1920) by Rudolf Steiner. (CW 180)
For your convenience, below is a zip file of this entire set of lectures. It does require that you have an unzipping utility of some kind on your computer. For you mac people this is built in.
The Entire Book Ancient Myths and the New Isis Mystery
1. The Nature of Mythical Thinking (January 4, 1918)
2. Development of Consciousness reflected in Myths (January 5, 1918)
3. Moral impulse enters when Old Testament God is seen as creator of human beings. (January 6, 1918)
4. Lifting the Veil of Isis (January 8, 1918)
5. Humanity getting 'younger' over time. (January 11, 1918)
6. Duality of the human being. (January 12, 1918)
7. The human being is the solution to the world riddle. (January 13, 1918)
8. Human evolution and the Mystery of Golgotha. Lecture of December 24, 1920