The holy book of Hindu's is _______

If I have to look these things up, that means you can, too!

1. Go to https://www.google.com

2. Type in your search words or question

3. Press the Enter key.

4. Read, read, read, and take good notes.

Bhagvadgeetha or vedas

http://www.sacred-texts.com/hin/

https://www.ancient.eu/Bhagavad_Gita/

https://www.hinduwebsite.com/gita/wisdom/gita-day12.asp

Is there only one? Or are there several which make up the whole of holy Hindu texts/

The holy book of Hindus is called the "Bhagavad Gita".