Ahriman Series - Order of Stories
If you are tracking the Ahriman series and wondering how the novels, short stories and audios fit together, here is the running order:
All is Dust*  (short story) - http://www.blacklibrary.com/all-products/all-is-dust-ebook.html
Exile (novel) - http://www.blacklibrary.com/warhammer-40000/ahriman-exile.html
The Dead Oracle* (short story) - http://www.blacklibrary.com/warhammer-40000/ahriman-dead-oracle.html
Fortune's Fool *(short story) - http://www.blacklibrary.com/all-products/ahriman-exodus-hardback.html
Hounds of Wrath* (short story) - Honour of the Space Marines, http://www.blacklibrary.com/warhammer-40000/honour-of-the-space-marines.html
The First Prince* (audio) - http://www.blacklibrary.com/warhammer-40000/ahriman-the-first-prince-mp3.html
Gates of Ruin* (short story) - http://www.blacklibrary.com/warhammer-40000/gates-of-ruin-ebook.html
Sorcerer (novel) -  http://www.blacklibrary.com/warhammer-40000/ahriman-sorcerer-paperback.html
Hand of Dust* (short story) - http://www.blacklibrary.com/warhammer-40000/advent-day-two-ahriman-hand-of-dust-ebook.html
King of Ashes* (short story) - http://www.blacklibrary.com/warhammer-40000/renegades-of-the-dark-millennium.html
Unchanged (novel) - http://www.blacklibrary.com/warhammer-40000/ahriman-unchanged-paperback.html