Title: The Assassins: A Radical Sect in Islam
Content:  The Assassins: A Radical Sect in Islam is a book, first published in 1967, written by Middle-East historian Bernard Lewis, and published by Weidenfeld & Nicolson. An updated edition was published by Oxford University Press in 1987, and another in 2002 by Basic Books.
Title: The Assassins: A Radical Sect in Islam
Content:  Lewis, a British-American professor of history at Princeton University, traces the history of the secret Islamic sect known as the Assassins, an order of the Nizari Ismailis that used assassinations throughout the Middle Ages to achieve political, military, and religious goals. The book has been noted for its arguments linking the early assassins with modern Islamic terrorism.
Title: Order of Assassins
Content:  The Assassins (أساسِيّون) were a Nizari Isma'ili sect of Shia Islam who lived in the mountains of Persia and in Syria between 1090 and 1275. During that time, they held a strict subterfuge policy throughout the Middle East through the covert murder of first Muslim and later Christian leaders who were considered enemies of their state. The modern term assassination is based on the tactics used by the Assassins. Nizari Isma'ilism formed in the late 11th century after a succession crisis within the Fatimid Caliphate between Nizar ibn al-Mustansir and his half-brother, caliph al-Musta'li. Contemporaneous historians include Arabs ibn al-Qalanisi and Ali ibn al-Athir and the Persian Ata-Malik Juvayni. The first two referred to the Assassins as batiniyya, an epithet widely accepted by Isma'ilis themselves.
Title: Order of Assassins
Content:  the Isma'ilis contributed to the popular view of the community as a radical sect of assassins, believed to be trained for the precise murder of their adversaries. By the 14th century, European scholarship on the topic had not advanced much beyond the work and tales from the Crusaders. The origins of the word forgotten, across Europe the term assassin had taken the meaning of "professional murderer". In 1603, the first Western publication on the topic of the Assassins was authored by a court official for King Henry IV of France and was mainly based on the narratives of Marco Polo 
Title: List of assassinations in fiction
Content: Cousins, Mark. The Story of Film, BCA, Pavilion Books, London, 2004. ; Hartley, William H., Ed.D. Selected Films for American History and Problems, Teachers College, Columbia University, New York, 1940. ; Lewis, Bernard. The Assassins: A Radical Sect in Islam, Weidenfeld & Nicolson, London, 1967; Phoenix, Orion Books, London, 2003. ; London, Jack. The Assassination Bureau, Ltd., McGraw-Hill, New York, 1963; Penguin Books, Harmondsworth, 1978. 
Title: Radical: My Journey out of Islamist Extremism
Content:  Daily Telegraph wrote "Because of its violent, continent-crossing story, this book seems quite out of the ordinary, but in its underlying tone, I find it reassuringly familiar." The New Humanist in its review wrote: "Nawaz's book is very much a companion piece to Ed Husain’s The Islamist (which was published in 2007), in that it is a much-needed insider’s account of Islamic extremism and, as such, it merits the description of "essential reading" for anyone seeking to understand what motivates bright, educated young men to embrace the fascist ideology of Islamism." The Indian Express wrote: "What a life, what a compelling storyteller. In parts you’ll need to remind yourself that what reads like an engrossing, fast-paced, action-packed thriller, a piece of fiction, is in fact a real-life account".
Title: Miguel Asín Palacios
Content: Huellas del Islam. Sto. Tomas de Aquino, Turmeda, Pascal, S. Juan de la Cruz (Madrid: España-Calpe, 1941), 307 pages. A collection of five articles, the fifth being on revelation in Islam and the Christian Scholastics. ; Obras escogidas (3 volumes, Madrid 1946-1948). Collection from books and articles. ; Sadilies y Alumbrados (Madrid: Ediciones Hiperión, 1989), 452 pages. The posthumously published articles, with a critical introduction by Luce López-Baralt at ix-lxviii. ; Tres estudios sobre pensamiento y místico hispano-musulmán (Madrid: Ediciones Hiperión, 1991). A collection of: Ibn Masarra (1914), Abu-l-Abbas (1931), San Juan de la Cruz (1933). 
Title: Assassins in popular culture
Content:  This article is a list of depictions of the historical Assassins — i.e., the Order of Assassins, formally known as the Nizari Ismailis, a Shia Islamic sect (ca. 1090 to 1275) in the mountains of Persia and Syria — in later literature and modern popular culture.
Title: Alamut Castle
Content:  During the medieval period, Western scholarship on the Ismailis contributed to the popular view of the community as a radical sect of assassins, believed to be trained for the precise murder of their adversaries. By the 14th century AD, European scholarship on the topic had not advanced much beyond the work and tales from the Crusaders. The origins of the word forgotten, across Europe the term assassin' had taken the meaning of "professional murderer". In 1603 the first Western publication on the topic of the Assassins was authored by a court official for King Henry IV and was mainly based on the narratives of Marco Polo (1254–1324) from his visits 
Title: Order of Assassins
Content:  in 1256 and, by 1275, the Mongols had destroyed and eliminated the order of Assassins. Accounts of the Assassins were preserved within Western, Arabic, Syriac, and Persian sources where they are depicted as trained killers, responsible for the systematic elimination of opposing figures. European orientalists in the 19th and 20th centuries also referred to the Isma'ili Assassins in their works, writing about them based on accounts in seminal works by medieval Sunni Arab and Persian authors, particularly ibn al-Qalanisi's Mudhayyal Ta'rikh Dimashq (Continuation of the Chronicle of Damascus), ibn al-Athir's al-Kāmil fit-Tārīkh (The Complete History), and Juvayni's Tarīkh-i Jahān-gushā (History of the World Conqueror).

Question: Who is the author of The Assassins: A Radical Sect in Islam?
Answer: Bernard Lewis.