Brief Methodology of Sunnah by Sheikh al-Islam Ibn Taymiyyah
It is one of the most great books authored by Sheikh al-Islam Ahmed ibn Abdul-Haleem ibn Taymeya (may Allah have mercy on him) in which he refuted Rafidah and Qadariah doctrines. Youth Muslims are in a dire need of reading it, for the Rafidah's doctrine became widespread, changed the Muslim countries, and deceived those do not know its reality. Because of the book contains some long and short sections in refuting the Qadariah doctrine and other sects, Sh. Abdullah Al-Ghunaiman (may Allah preserve him) has summarized it to just include the sections of refuting the misconceptions about califate, prophet's companions, mothers of the believers and so on so it will be easy for all Muslims to benefit from it.