The work praises Genji and then goes on to discuss various works of courtly fiction in roughly chronological order .
Is not only the sole work of such literary criticism to survive from this period but is also valuable for detailing the history of the genre .
The work praises Genji and then goes on to discuss various works of courtly fiction in roughly chronological order , and is not only the sole work of such literary criticism to survive from this period but is also valuable for detailing the history of the genre .