Board Thread:Warhammer 40k General Discussion/@comment-25222488-20151014231624/@comment-8881468-20151016141515

the helping Space Marine wasd Cypher (bolt pistol+ plasma pistol user with a sword he never drew) and Antigone lied to Dark Angels about the involvement of Cypher in that battle.

and antigone was no hero of the imperium, he was a fleeing coward who  only stayed alive long enough to bhe made a hero by virtue of being a liar and ending up easy public relations material.

as for audiobooks: several of the HH series books have been tunred into audiobooks and a ton of short stories were tunred into audio dramas

lexicanum has a quite extensive list