Nowadays, whenever we read a fantasy book that is about someone trying to usurp someone and take the throne, we think of Game of Thrones. However, the truth is that those kinds of medieval politics always appear in fantasy works in one form or another. The reason for this is because fantasy as a genre is largely based on medieval Europe and during those days there was always someone trying to overthrow someone else for the throne. This was the case when Henry IV usurped Richard II, or William the Conqueror usurping Harold Godwinson, or Edward IV usurping Henry VI, or Henry VII usurping Richard III. The list goes on and on into infinity. Therefore, when someone writes a fantasy story about someone trying to usurp a dynasty and claim a throne for themselves that does not mean that they are basing it on Game of Thrones.