Often, the holy writings are written differently due to translation errors or differing translation methods.
According to Hindu Vedas Mahabharata Ramayan Bhagwat Geeta are the most holy writings. These were written by Supreme God himself.
Part of the Bahá'í holy writings were written in Arabic, part in Persian. The Most Holy Book, however, was written in Arabic.
Veda
Gurmukhi
The Holy scripture of Sikhs is called Guru Granth Sahib Ji. It contains the writings of seven Sikh Gurus along with the writings of fifteen Saints of different socio-economic and religious background who were Hindus and Muslims.
Yes there are.
Yes it was what you were thinking......... a "BIBLE"
there is no true holy bible that resembles the Koran they were written in far different time periods.
The Canonical Codes.
The Bible very simply.
Torah.
The Holy Bible, the writings of the Church Fathers, & various other writers such as St. Thomas Aquinas.