Cover for the War of Emperium guide book.

The Ragnarok Online: The War of Emperium guide book is a physical guide book that was published by Summit Media Publishing for the MMORPG Ragnarok Online. The guide book is based on the game's major update "War of Emperium" and "Turtle Island". It originally retailed for ₱195.00.

It was followed up by the Juno guide book.