The Ragnarok Online: Juno 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 "Juno". It originally retailed for ₱195.00.

It was preceded by The War of Emperium guide book.

The Juno guide book is similar to the presentation of the previous guide book, however, it was widely criticized for the exclusion of the skill descriptions of 2-1 job classes, an incomplete database that also lacked key information in some areas, as well as having guides that were directly copied from the previous guide book.