A treatise on ideal governance, authored by Kautilya, also called Chanakya.
Read more here
https://www.thehinduportal.com/2015/09/chanakya-great-visionary-translated.html
https://www.thehinduportal.com/2016/08/chanakya-neeti-and-6-principles-of.html
http://dharmarajya.swarnayug.org/uploads/1/2/1/8/12185983/arthashastra_of_chanakya.pdf