Before Jeff Bezos became a multi-billionaire, he used to write product reviews for Amazon and over a period of six years between 2000 and 2006, he reviewed non-fiction books, a novel, a movie, binoculars and even milk.

Unearthed by inc.com's contributing editor Billy Murphy Jr, the old reviews by the world's richest man are genuine and are given five stars, which is the highest score for a review on the e-commerce platform.