Metroid Prime 2 Dark Echoes Light and Dark Perfect Book is a Japanese strategy guide for Metroid Prime 2: Echoes, published by Mediaworks on July 2, 2005. The guide is 112 pages long and depicts a render of the Dark Suit on its cover, enveloped in shadow. The ISBN number is ISBN4-8402-3133-8. Some versions of the guide depict "100 OK!" on the cover in bold yellow font - this being accompanied by a promotional render of Samus in her Varia Suit - while others do not have this.
It was one of four Japanese strategy guides sold for Echoes, with others published by Shogakukan, Enterbrain and Daily Communications.
- Metroid Prime 2: Echoes: The Official Nintendo Player's Guide, the English guide
- Nintendo Official Guidebook for Metroid Prime 2 Dark Echoes, another Japanese Echoes guide, published by Shogakukan