Yes, they allow books. But unfortunately you wouldn't be able to join them unless you hold their specific religious convictions.

My hope is that intentional communities can form that support each other so that they are not subject to strong competitive pressures that practically necessitate anti-consumer practices and the use of modern technology that does more harm than good. The central principles would be belief that doing things the natural way is (almost always) best and that societal wellbeing is largely unrelated to efficiency, economics and material goods once the basic needs have been met. No other religion or beliefs would be required. Through their positive example these communities would influence the rest of the world in the right direction too so that we might not become extinct.

To this end I started https://lemmy.today/c/StopTech and https://lemmy.today/c/ParallelSocieties. I'm working on groups on other platforms as well and trying to start a community in the real world.