The Humanist Manifesto
Humanism does not follow a specific holy book like many religions do. Instead, Humanism is a non-religious worldview that focuses on reason, ethics, and human values without the need for supernatural beliefs. Humanists draw from various sources such as philosophy, science, and literature to guide their ethical and moral decisions.
The holy book
Not all holy book are the same , the best holy book is the BIBLE
to teach you to look in your text book
Holy book for Parsis or Zorastrianism is Avesta.
The holy book of Sikhs is Gurugranth Saheb.
Humanism is not a religion, and so, doesn't have a religious book. it is an outlook on life and a system of thought which attributes prime importance to humans rather than supernatural or divine beings.
There is not a secular holy book, that would be an oxymoron.
Yes. The holy book of Christianity is the Bible.
Quran is the Muslim holy book
The Torah is the holy book of Judaism.
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.