Manley P. Hall.. is some kind of Rosicrucian as I recall.. A spiritualist, no doubt connected to "The New Age Religion".. of the occultists.. I bought his book.. and it was lavishly produced..
A book about truth would get no hard cover, with expensive glossy pictures, a book about truth would get printed on toilet tissue and flushed down the toilet by the publishers... But then again, this guy was the dude who would lead us collectively to the religion of Madonna .. The kabala... The religion of the NWO.
Manley P. Hall helped lead us into the clutches of "The Greys".. And for his treason against humanity.. May he rot in Hell.