Encyclopedia of Afghan Jihad, is a manual of Jihad in eleven volumes, detailing how to make and use explosives and firearms, how to plan and carry out assassinations and other terrorist acts, and much more, it was found in the London residence of which Islamic cleric, who was the imam of Finsbury Park Mosque in London, England, where he preached Islamic fundamentalism and militant Islamism?
Encyclopedia of Afghan Jihad:  It was found in the London residence of Islamic cleric Sheikh Abu Hamza al-Masri in May 2004. Abu Hamza al-Masri: Mustafa Kamel Mustafa (Arabic: مصطفى كامل مصطفى‎ ‎ ; born 15 April 1958), also known as Abu Hamza al-Masri ( أبو حمزة المصري , "Abū Ḥamzah al-Maṣrī" – literally, the Egyptian father of Hamza), the Hook Hand or simply Abu Hamza, is an Egyptian cleric who was the imam of Finsbury Park Mosque in London, England, where he preached Islamic fundamentalism and militant Islamism.
Abu Hamza al-Masri