This collection is very comprehensive and gets a lot of praise (it was even recommended by Elon Musk), but the first book was written in the 30’s. Are there major things that we now know to be wrong? Is it still as relevant as it was decades ago?
Someone asked this quite recently, and I and u/keloyd answered it here. But certainly more could be said about this series, there are a lot of copies of it out there.