What are /r/BarbellMedicine's favorite Products & Services?

From 3.5 billion Reddit comments

This book is quite necessary if you aim to learn more about the ins and outs of periodization nutrition, etc. Another book I'd highly recommend is this book by the legend, Zatsiorsky, which is focused mainly on periodization and important principles on strength training.

Getting both of these either new or in good condition via amazon is cheaper than what you'd pay for this RTS classroom thing, which is either 100 or 135 bucks per month, which is not worth it when there's cheaper literature by the folks who run the game.