Ghosts Speak Not is the twenty-fifth short story published in the Horus Heresy Series that was not originally part of an anthology novel. Ghosts Speak Not was first published as a double e-book with the short story Patience as part of the "Tales of the Knights Errant" week. Both are now included in The Silent War anthology novel. Ghosts Speak Not is considered a novellete.
When Nathaniel Garro carried word of the Warmaster Horus' treachery to Terra, he also brought with him seventy loyal sons of the XIV Legion. Distrusted by their kinsmen, they languished in seclusion on Luna...until now.
- Ghosts Speak Not (Short Story) by James Swallow