It seems that you are getting rid of things you don't need, like the books. You are perhaps saving money and improving your health by growing your food. Only you can decide if what you are doing is right for you. If you want to do more, and it is right for you, then do it. This isn't a fad to be joined. People do it because they try it and some of them like having less stuff around, which contributes in some ways to a simpler lifestyle.
Your goals and mine are probably different. Since you've read this thread you have many ideas about what you would like to try. What comes across to me in this thread is an overall vibe of people realizing they don't need all of the stuff they've accumulated. Getting rid of some of it is beneficial for many reasons. The things we shed go to others who can use them now instead of them sitting around in our lives unused. By doing that we save money for others and sometimes take in a little bit of money. It allows others to have things that they might have had to pay full price for new ones. It saves the environment a bit by keeping things out of landfills.
Every thing I own holds a tiny bit of my attention. I must think about how to preserve it, store it, and to keep it secure. Every thing I give away or sell leaves my space and no longer requires any of my attention. In addition to giving me more physical space it gives me more mental space. For everything I let go I recover a tiny bit of my attention to be used for other purposes. This is why my long term goal is to own very few items.