Next up in the Horus Heresy Series is Nemesis, by James Swallow. Ever since Flight of the Eisenstein, I have looked forward to reading more of his work. Listening to the Garro Audio dramas he wrote were fun, but I didn't get the same feeling from them as his novel. This novel focuses on the Officio Assassinorum and agents of its five clades: Eversor, Callidus, Culexus, Venenum, Vanus, and Vindicare.
As with recent reviews, I will put the spoiler alert here: below the jump I will not hold back details I think are relevant for discussion.