I tried reading Wikipedia but it is pretty ridiculous. But I did get that they're like a certain class we have in my country, so I got very interested in learning how they were dealt with and how they reacted.
Doug tottles' fraud famine and fascism should be a decent book to give you an overall picture of the world the Stalin Era Bolsheviks and the kulaks battled in and the information war surrounding their historical period
Here's a thing of sources about anti-communists destroying crops and shit to facilitate famine deaths, some of it is about the Kulaks.
https://web.archive.org/web/20210822183335/https://imgur.com/a/k9MijPN
Peasants, Political Police, and the Early Soviet State: Surveillance and Accommodation under the New Economic Policy by Hugh Hudson