Tractate Serith
From Warhammer 40k - Lexicanum
The Tractate Serith is a proscribed text. It is a work on the nature of divinity written by Catullus Ven. Most copies of the work were destroyed in the scouring of Himsezia, only fragments remaining but a intact copy is said to exist in Archive Node 090 of the Archive World Serapho. Copies may also exist in the Inquisition archives.[1]