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Aqeedah (Creed & Belief) Monotheism - Tawheed Purification of The Soul Scholars of Islam Seeking Knowledge Worship - 'Ibaadah'

Shaikh Shamsuddeen Al-Afghaanee (rahimahullaah) wrote a very beneficial 3 volume refutation against the grave worshipers

See here:

Juhoodul Ulamaa Al-Hanafiyyah