Ruan Economics (ルーアン経済史, ruuan keizaishi) is a trilogy of books found in Trails in the Sky FC. The books are located in the Material Archives at Jenis Royal Academy in Ruan, but are found around the campus during a sidequest.
They can be found in Trails in the Sky FC in the following locations:
|Volume 1||Chapter 2: "Madrigal of the White Magnolia"||Boy's Locker Room, Jenis Royal Academy|
|Volume 2||Faculty Office, Jenis Royal Academy|
|Volume 3||Argyle's desk in Boy's Dorm, Jenis Royal Academy|