FTP, name this long allegory-epic beginning with the adventures of the Redcrosse Knight, by Edmund Spencer.
The last of its books describes a battle watched by Nature on Arlo's Hill between god and a character who has overthrown Justice, a collection of nine-line stanzas called the "Mutabilitie Cantos."  The central character of this work's first book falls prey to the lady of Sansfoy.  In the second book, a hero searches for her future husband Artegall, who she sees in a mirror.  Another hero has already met the witch Duessa, but he does penance and continues his search for Una.  FTP, name this long allegory-epic beginning with the adventures of the Redcrosse Knight, by Edmund Spencer.
The last of its books describes a battle watched by Nature on Arlo's Hill between god and a character who has overthrown Justice, a collection of nine-line stanzas called the "Mutabilitie Cantos."  
The Faerie Queene