A large amount of research was done over the centuries of objects of Otherwordly origin, such as Blackstone or Effluvium.

Below is a list of some of volumes of note.

Potentiae Lapis Niger

The Powers of the Black Stone, by Silvius Garabella, 317 A.D.

Early study of the Blackstone focused on how to protect oneself from it, and how to destroy it.

Þe Blaecstan Magyk

The Blackstone Magic, by Parsifal Bleckner, 1169.

A study focused on practical uses of Blackstone, with experiments on grinding it, using it on live creatures, or as a weapon.

Compendium Terrae Umbra

Compendium of the Shadow Earth, 1769.

A collection of art from a variety of people sensitive to the Effluvium — poets, painters and lunatics.