I guess it doesn't have to be a book. This is the list of the ones I've read/listened to so far that I think are tremendously interesting or important (I know, it's a short list):

World Without Cancer, by G. Edward Griffin,

The Creature from Jekyll Island, by G. Edward Griffin,

Borax Conspiracy (article: https://pforlife.com/borax-conspiracy.html)

 Currently I'm listening to Tragedy and Hope 101 by Joseph Plummer (if you're familiar with Tragedy and Hope by Carroll Quigley, this is just a synthesis of that long and difficult to find book.) Additionally I'm planning on reading The Real Lincoln by Thomas DiLorenzo next.

If you have any strong recommendations, please share!