The top 10 philosophical graphic novels vary in their themes and styles. 'Watchmen' challenges our views on superheroes and power dynamics. 'Maus' uses the unique format to tell a heart - wrenching story of the Holocaust and forces us to consider human nature in such atrocities. 'The Sandman' series is like a journey through different realms of the mind, exploring the very fabric of reality and dreams. 'Persepolis' gives an intimate look into life in Iran during a revolution, making us think about cultural identity. 'V for Vendetta' makes us question the role of the state and the power of the individual to resist. Each of these novels has a distinct voice in the world of philosophical graphic novels.