I know what you mean, I assume that since they are from the 30,000 they aren't as well know as there 40k equivelent i.e. Sisters of Battle. If you want 30k artwork the best resouce I've found is the Visions of the Horas Heresy artbook.
yes some of the fluff in it differs to that written in the horus heresy book series such as the flight of the eisenstein the space marines that boarded that ship were actually from all manners of legions while in the books it was all death guard and a single luna wolf
mmm, missed that, haven't read it in a while. all ot the images come with a squad name or name of the captain etc and a few turn up in the horus heresy books, like the dark angel chapter master who's name I can't remember.
Quiet impressive and quiet awe inspiring from the words you put into it that really has in part depict the Sister of Silence with such undying vow to loyalty for the Emperor and there duty and they where also known as the Silent Sisterhood, were the militant arm of the Adeptus Astra Telepathica during the Great Crusade, and were internally referred to as the organization's Departmento Investigates.