Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Maulana Jalal al-Din Rumi
Ghazzali
‘Ali ibn ‘Usman Hujviri
Reynold Alleyne Nicholson
Claud Field
Sharaf al-Din Ahmad ibn Yahya Maniri
Omar Khayyam
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.