The book of topics is a book on the hadiths that are lying on the Messenger of God, composed by Al-Hassan bin Muhammad Al-Saghani (577-650). The topics are considered a valuable book in its chapter because it includes the lying of lying on the Prophet, and he mentioned some of the hadiths placed on the Messenger, and mentioned the names of the weak and the left of the imams of the hadith, The book contained 145 hadiths.