- E-bookThe Ufo Phenomenon and the Birth of the Jewish, Christian, and Muslim ReligionsRobert Iturralde
- E-bookEssay on the Theory of the EarthRobert Iturralde
- E-bookA Treatise on Human NatureRobert Iturralde
- E-bookUfos, Teleportation, and the Mysterious Disappearance of Malaysian Airlines Flight #370Robert Iturralde
- E-bookThe UFO Phenomenon and The Origin Of Mass ExtinctionsRobert Iturralde