Mechanicum (Novel)

"War comes to Mars"

- Book's tag-line

Mechanicum is the ninth book in the Horus Heresy series

Plot Summary
Mechanicum is about the civil war or Schism of Mars as Traitor and Loyalist forces fight to determine which side in the struggle will receive the support of the Adeptus Mechanicus.

Horus obtains the secret allegiance of highly placed Mechanicus Adepts who plot and eventually carry out a coup d'etat in order to eliminate those on Mars who remain Loyal to the Emperor.