Death guard, Typhon, and Erebus.

[Warmaster Lucos]

After reading 'flight of the eisenstien' again my attention was brought to a particular moment in the book where typhon, aboard terminus est is reminiscent of a time when Erebus showed him some books and enlightened him to the knowledge of the rouinous powers. I wondered is this documented in other horus herasy books? i have not read the entire series but it is not mentioned in any that i know about.
i would like more general knowledge about the 'dirty secrets' like this that happened under the noses of the loyal marines, the particular bit in the 'f.o.t.e' is especially dark as typhon broods in his command throne, and the image really spoke to me.

[PoisonWood]

with that particular moments that he is refering to no...but if you want quite a bit of background knowledge on a lot of the World Bearers and how their teachings went(including Erebus). Then check out The First Heretic by ADB (IMO you dont NEED to read the entire HH series that comes before that book to understand it)