Atheists are by nature not open to being told what is right or wrong but through personal experience and indeed actual studies they are generally more moral than theists. What would the community of atheists feel about a book that communicated basic human morality as an atheist that would be beneficial for everyone for social and progressive reasons? Would they support a standardized moral code? What would that look like? Would it need to be rigid or change over time and be fluid? Is there anything out there that is comparable already? Is it accessible, like readable for the masses?
We have a constitution, we have laws and by-laws, we have a society we live in with unwritten rules that we could live by. And these could change if we collectively think they need to be changed. Our world is evolving around us. We no longer live in the dark ages with witch hunts and most countries have moved on from death penalties. I hope that gives enough of an answer.
Just be good to one another and enjoy this life. I don't believe the principles need to be written down like a guide. We need to discover these things ourselves and understand why, not just blindly follow some code. We've seen how that can be a bad thing.
That would be contrary to human nature, such confinments lead to mental disorder. Social compliance disorder is what I call it. Telling people what they believe is hurtful. It's likely akin to gaslighting.
Ethics are solely principles meant to propagate the species that's it that's all
I think a casual, light-toned, mildly self-depreciating book about morality as an atheist would be good simply for something to quote passages from, to hold up as a general ideal when people accuse atheists of devil-worship and baby eating. But anything that attempts to be a comprehensive, definitive work is asking for trouble. So I voted maybe.