Ancient & Comparative Mythology

Comparative Mythology: Lectures. Gerald Massey.
http://archive.org/details/GeraldMassey-Lectures

The Natural Genesis: Vol. 1. Gerald Massey.
http://archive.org/details/TheNaturalGenesisvolume1

The Natural Genesis: Vol. 2. Gerald Massey.
http://archive.org/details/TheNaturalGenesisvolume2

Moses and Monotheism. Sigmund Freud.
http://archive.org/details/mosesandmonothei032233mbp

Zoroastrianism and the Bible- Monotheism by Coincidence. Erhard S. Gerstenberger.
http://archive.org/details/ZoroastrianismAndTheZoroastrianism-MonotheismByCoincidence