Saw a post you made about trying to get dnd things for your brothers, but had trouble reblogging it for some reason. The Dungeons and Dragons Starter Set has all the basics you need to get a low level campaign started, and it is on sale for about $15 on amazon. Another gift idea would be polyhedral dice in their favorite colors. You can find a lot of information about dnd online using sites like roll20, so the more expensive books aren’t necessary to get started.