
The Book of Rule explains the system of government of for every country in the world. Don't know the difference between bicameral and unicameral? Democracy vs. Republicanism vs. Theocracy? Absolute Monarchy vs. Constitutional Monarchy? Is Canada run by the Queen of England? Is their a country where their king is elected? (There is, but the ruler isn't called a king) Who, exactly, elects the US president? (Hint: it's not the people)
I acknowledge that this book is a touch out of date (nearly 10 years old), but generally speaking, the information holds true. Most countries don't change that much that frequently.