This author wrote a sonnet to his friend Guido Cavalcanti that is part of a forty-two-section collection of prose and poetry. In another of this author's works, he meets a lion, a leopard, and a wolf in a forest before he crosses the Acheron. Later in that work, this author of La Vita Nuova ascends through nine spheres and enters the Empyrean. He wrote a work in which he ventures through Hell and 
This author wrote a sonnet to his friend Guido Cavalcanti that is part of a forty-two-section collection of prose and poetry. In another of this author's works, he meets a lion, a leopard, and a wolf in a forest before he crosses the Acheron. Later in that work, this author of La Vita Nuova ascends through nine spheres and enters the Empyrean. He wrote a work in which he ventures through Hell and Purgatory, and is guided through Heaven by Beatrice. For 10 points, name this author whose Inferno and Paradiso form parts of his Divine Comedy.
This author wrote a sonnet to his friend Guido Cavalcanti that is part of a forty-two-section collection of prose and poetry.
Dante Alighieri [accept either]