There are some very interesting discussions on government and electorial constructs(for lack of better word) in different countries and pros and cons of these,

There are some very interesting discussions on government and electorial constructs(for lack of better word) in different countries and pros and cons of these, in the comments here. Can anyone point to any good documentaries, books or other reading digging a bit deeper into this subject? Given the focus on the US election at the moment and a lot of people seeing it as two bad options, then why is the US system like that and in for instance Denmark where I'm from we have multiple choices. What's the history behind each, pros and cons etc.