The Qur'an in the case of most Modern Iranians. In the case of Ancient Iranians, it was the Gathas or the Zend Avesta.
Yes ,the Zend Avesta is the sacred book of the persians.
The majority of Persians (Iranians) are Shi'ite Muslims and their holy book is the Qur'an a/k/a the Koran.
It is the sacred book at the Sikh Religion.
Emily used a sacred book for church.
The sacred book of Sikhism is called the Guru Granth Sahib, not Tohra.
Of course it is. It is the sacred book of Christianity.
No the sacred book of Islam is called The Holy Qur'an
With care and respect, even if it is not sacred to your religion.
yes
The Bible
The Old Testament is sacred to Judaism
The sacred writing of Buddhism is Tipitaka, and is a very large book.