You should study the Book of Allaah (Glorified and Exalted be He) which contains guidance and light and the Sunnah of his Messenger (peace be upon him). You should also study the books of Tafsir (exegesis of the meanings of the Qur’an) and that of the science of Hadith with the help of specialized scholars.
It is important that you act upon what you learn. Whoever acts upon what they learn will be granted the knowledge of things that they do not know. The following books are highly recommended: the Two Sahih (authentic) Books of Hadith (i.e., Al-Bukhari and Muslim), Bulugh Al-Maram, `Umdat Al-Hadith by `Abdul-Ghany bin `Abdul-Wahid Al-Maqdisy, Muntaqa Al-Khbar and Zad Al-Ma`ad by Ibn Al-Qayyim, and Al-`Aqeedah Al-Wasittiyah by Shaykh Al-Islam Ibn Taymiyah (May Allah be merciful with them both) in addition to Al-Tawhid (Book of monotheism), Kashf Al-Shobuhat, and Fath Al-Majid.
May Allah grant us success! May peace and blessings of Allah be upon our Prophet Muhammad, his family and Companions!
Permanent Committee for Scholarly Research and Ifta’