TL;DR: I want to learn about disinformation. Where do recommend I start?

Background:

I’ve been a bit apprehensive about disinformation for a while now more than ever with the rising tide of post truth content on the internet and the active toppling of governments from within using info warfare. I’m also seeing a whole lot of users in suspicious activities online who, for example, leave spicy live bait in political comment sections. So I’ve gotten suspicious and also curious about this secret world behind the veil.

I’m not exactly sure of what I’m looking for because of this unknown unknown, so bear with me. I’m imagining learning about an underlying theory with illustrative examples that relate to modern groups and their tactics.

I’m thinking of something more robust than articles or blog posts and yet less dense than academic material, so maybe some books or long-form videos would be great, although any format is welcome. I wonder if there are reliable & trustworthy authors, science communicators, intelligentsias, or researchers themselves who put out this accessible content.

I’m familiar with the book An Ugly Truth: Inside Facebook’s Battle for Domination that exposes the play-by-play of foreign disinformation farms in American politics during the 2018 election. I thought it was great but limited in scope to Facebook along with the few countries it touches on. But learning about the rest of the nations along a broader timeline would be more ideal.

Do you have any suggestions? What would be a right approach to get myself soaking wet in the topic?