As the students of H.I.V.E. face the challenges of their final year at the school, Otto Malpense is forced to confront his own legacy as a new threat rises from the shadows of his past. Old wounds will be reopened and dark, hidden secrets will be revealed as H.I.V.E.'s enemies seek a final, ruthless revenge against the school. Otto and his friends face a desperate, deadly fight against an enemy more powerful and dangerous than any they have faced before - a twisted product of his own bloodline. Nothing will ever be the same again... From Italy to Russia and back via the USA, Otto battles against time to defeat an enemy who seems to hold all the cards, while uncaring of the cost to human life. Featuring all your favourite characters from previous books in the series, Bloodline is a real tour de force, and a fitting conclusion to Walden's H.I.V.E series.