Lucius: The Eternal Blade (Black Library Advent Calendar 2013 #21)

Renowned as one of the finest duelists the galaxy has ever known, Lucius seeks ever greater challenges against which to test himself. After the Emperor's Children Legion scattered in the wake of their primarch's apotheosis on Iydris, he finds his way into the domain of a similarly legendary swordsman - Sanakht of the Thousand Sons. But which of these infamous warriors carries the greater favour amongst their new masters?

A Horus Heresy Audio by Graham McNeill