The Old books of Sunnites, on the theme of Imam Mahdi (hgr)
A lot of Sunni scholars have written books regarding Imam Mahdi (hgr).
For example, the first one who wrote an independent book about Imam Mahdi (hgr)
was “Ibād ibn Ya’qūb Rawajati”.
His book is “Akhbār Al-Mahdi”.
He lived in Imam Askari (pbuh)’s lifetime,