What is the Catholic holy book?

Answer:
The holy book of the Catholic Church is the Holy Bible.
We also have other texts, such as the Catechism of the Catholic Church, and thousands of prayer books, and other books by saints and the Popes.

The Bible must have Imprimatur in the first few pages before chapters.
a license to print/publish especially by Roman Catholic episcopal authority or approval of a publication under circumstances of official censorship
Contributor: PiusX
First answer by Ivain. Last edit by PiusX. Contributor trust: 135 [recommend contributor recommended]. Question popularity: 6 [recommend question].