The 12th Planet by Zecheria Sitchin deals extensively with them.
So does the rest of the "Earth Chronicles."
Go forth and read, kiddo - they're on amazon for like eight bucks a pop. Easy to read, informative, and occasionally thoughtful to a fault ...hope
that helps!
A British goth bands, ripped off the sisters of mercy, reached their peak in the mid-eighties, for best albums check out dawnrazor, that ennio
morricone intro's wicked But seriously, I thought they were a rank of angels or sometihng of that nature.