Book 4 in the Global best selling The Horus Heresy: Siege of Terra series.
The Traitor Host of Horus Lupercal tightens its iron grip on the Palace of Terra, and one by one the walls and bastions begin to crumple and collapse. Rogal Dorn, Praetorian of Terra, redoubles his efforts to keep the relentless enemy at bay, but his forces are vastly outnumbered and hopelessly outgunned. Dorn simply cannot defend everything. Any chance of survival now requires sacrifice, but what battles dare he lose so that others can be won? Is there one tactical stroke, one crucial combat, that could turn the tide forever and win the war outright?
Dan Abnett (born 1965) is a British comic book writer and novelist. He has been a frequent collaborator with fellow writer Andy Lanning, and is known for his work on books for both Marvel Comics, and their UK imprint, Marvel UK, since the 1990s, and also 2000 AD. He has also contributed to DC Comics titles, and his Warhammer Fantasy and Warhammer 40,000 novels and graphic novels for Games Workshop's Black Library now run to several dozen titles and have sold over two million copies. In 2009 he released his first original fiction novels through Angry Robot books.