Warriors of Ultramar
Book 2 of the Chronicles of Uriel Ventris
The Great Devourer is descending on the world of Tarsis Ultra, but to defeat the xenos horrors, Captain Uriel Ventris may have to embark upon a dangerous and unorthodox mission.
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It's a classic tale of the Space Marines against tyranids... with a twist. Conventional tactics fail, the Ultramarines way of war is insufficient... but if he uses other means to win the war, Uriel Ventris may lose far more.