For a longer while now I am contemplating doing some more foundational study rather than looking at training videos, doing hand reviews and writing solver summaries.

My idea is to consistently dedicate some study time to understanding the GTO principles that underly all the conclusions that we might draw from the above mentioned methods. Predominantly I would want to work through a book together with a partner to discuss and summarize the chapters. Anyone interested?

It could be Modern Poker Theory by Acevedo or Mastering Poker: The Game Theory of No Limit Hold'em by Thomas Pinnock. I recently got recommended Expert Heads Up No Limit Hold'em by Will Tipton, so this would also be an option. The only condition would be that the book comprehensively works through GTO principles and is not written by Matthew Janda.