‘Fulgrim’ is the fifth book in ‘The Horus Heresy’ series. The book ‘Fulgrim’ is written by Graham McNeill. The story is set in the 31st millennium, and the story is about follows Fulgrim, Primarch of the Emperor’s Children, leading his warriors against an alien foe. The story analyzes the seeds of betrayal and corruption within the army, Which led to their drop site massacre at Istvan V. This book consists of Science, Fantasy, and Fiction genres.