Two questions:

I'd like to start reading the Foundation series. What order should I read them in? I've seen a recommended reading order by Asimov himself posted in /c/Foundation, which is in order based on when the events take place, but I've seen it suggested to instead read them in publication history order to avoid spoilers and so that things make sense. Which order would you recommend?

Also, where's the best place to pick up hardcover editions? I'd love to add them to my library. Is the Robot series sold as a hardcover collection anywhere?