What book (bible) does Kuma always hold?


Bartholomew Kuma is always seen holding this book (a bible)

![enter image description here](https://i.stack.imgur.com/pd8c2.png)

What is this book?

**EDIT**

What type of bible is this? Just a regular bible, a bible from the One Piece
world, or what? Is he some kind of priest? His shirt has same pattern as the
bible.




It's clear from the pic that it's The Bible. And I believe that there is only
one Bible (content-wise). About different versions - they're all translated
from the original Bible. You can get a clearer view about the different
versions of Bible [here](http://www.bible.ca/b-many-versions.htm).

> [Kuma](http://onepiece.wikia.com/wiki/Bartholomew_Kuma) is an enormous man,
> (22'6" feet tall). He is the tallest remaining Shichibukai (being one inch
> shorter than former member Gekko Moriah) and **is usually seen carrying a
> Bible.**

Source: [Bartholomew Kuma - The One Piece
Wiki](http://onepiece.wikia.com/wiki/Bartholomew_Kuma) (emphasis added)

Here's a pic depicting the name of the book much more clearly.

![Bartholomew Kuma holding a Bible](https://i.stack.imgur.com/CAz39.png)

