Beatrice guides Dante through the nine celestial spheres of Heaven. the structures of the Inferno and Purgatory were based on different classifications of sin, the structure of the Paradise is based on the four cardinal virtues and the three theological virtues. Dante's Paradise is the third book in the Divine Comedy trilogy. This book follows Dante's Inferno which inspired Dan Brown's Inferno novel, EA's computer game Dante's Inferno and an animated epic Dante's Inferno.