Question: Shaykh may Allah have mercy upon you, if a certain person went astray, can we read the books he wrote before going astray or should we avoid reading them altogether?
Answer: Regarding your question then my reply is, we do not advice you to read their books or listen to their tapes or CDs! What pleases me is the statement of the Shaykh of Islaam who said:
“Had Allah not produced or allowed these books to be produced (Sahih Bukhaari and Sahih Muslim) the people would have gone astray.”
Allah the Exalted and High has preserved this Deen, as He says in the Quraan:
إِنَّا نَحْنُ نَزَّلْنَا الذِّكْرَ وَإِنَّا لَهُ لَحَافِظُونَ
Verily, We, it is We Who have sent down the Dhikr (i.e. the Quraan) and surely We will guard it (from corruption).
(Suratul Hijr 9)
So in short, we do not advice reading or listening to their tapes or Cd’s or going to their lectures, what Allah the Exalted has revealed and said is enough for us, so we should rely on that rather than what they say and write in there books and Allah is the granter of success.