The Ancient Assyrians did not really have a holy book. Modern Assyrians are Christians who follow the Peshitta or the Aramaic/Syriac Bible. It is most similar to The Bible used by Orthodox Christians, but there are still a few differences and is written in Aramaic, not Latin or Greek.
The holy book
Not all holy book are the same , the best holy book is the BIBLE
Holy book for Parsis or Zorastrianism is Avesta.
The holy book of Sikhs is Gurugranth Saheb.
There is not a secular holy book, that would be an oxymoron.
Yes. The holy book of Christianity is the Bible.
The Torah is the holy book of Judaism.
Quran is the Muslim holy book
Yes indeed the holy book of the Christians is the BIBLE.
The last holy book of God is Qur'an; Muslim's holy book. Before Qur'an there are God holy books of Psalm, Torah, and the Bible.
The Torah is the Holy Book of Judaism for Jews, yes.
It has no holy book, nor any sacred scriptures.