You will not find the full, copyrighted audiobook on YouTube. However, Black Library’s official channel and some lore channels post sample chapters (e.g., the first 10-15 minutes). This is a great way to preview the narration for free.
The most reliable way to experience the Eisenhorn series in audio format for "free" is through legal introductory offers or public resources: eisenhorn: omnibus free online audiobook
Some possibilities for accessing a free online audiobook of the Eisenhorn omnibus include: You will not find the full, copyrighted audiobook on YouTube
First, it is important to clarify terminology. An “omnibus” usually denotes a collected edition of multiple books. The Eisenhorn: Omnibus is a physical or eBook compilation. While Black Library has produced individual audiobooks for Xenos , Malleus , and Hereticus , they have not released a single, free, official audiobook file of the entire omnibus. Copyright holders (Games Workshop / Black Library) protect their IP aggressively. You will not find a legal, studio-recorded version of these audiobooks on YouTube, Spotify (free tier), or a random website without encountering piracy. The most reliable way to experience the Eisenhorn
If you have a library card in the US, UK, or many other countries, use Libby or Hoopla Digital . These apps connect to your local library’s digital collection. Many libraries carry the Black Library audiobooks. Hoopla, in particular, often has no waitlists. Search for “Eisenhorn” or “Dan Abnett.” This is the safest, most ethical free method.