There are several ways information can be made available to the readers. Cluttered menus are highly unpopular, and mind maps are most popular.
While there is wealth of info on Agile/Scrum on the internet, AgileAtlas has made a good attempt to show the info in a easily navigable way. Here is the screen shot of the website
One could click on an of these topics to get a detailed overview of the same. Best part is the Forum, top guns of Agile (like Ron Jeffries, Mike Cohn, MJ) are the key contributors here. If anyone has any doubt about Agile/Scrum, this is the place to get it answered.