The fourth book in the ‘Sentinels of Tzurac’ sci-fi quadrilogy is again action packed with a forgotten, unbeaten super army recruited to gain possession of the powerful crystal Xytrinium.

Some of the heroes and villains readers loved or hated in the previous books re-emerge, keeping readers intrigued with each turn of the page.

James Raven’s new book will keep the reader fixated. With more martial arts action and space battles, Vengeance is sure to bring thrills and excitement to fans who enjoy science-fiction action and adventure.