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Mirror World is the fifth and final volume in the Hero Factory: Secret Missions series by Greg Farshtey. Its storyline concerns the titular alternate universe, in which the heroes of Hero Factory find a world where their organization does not exist and the counterparts of their various foes and the evil Brains terrorize its residents.
This is a description taken from LEGO.com. Do not modify it.
The fifth action-packed novel in the LEGO(R) Hero Factory: Secret Mission series.
A new, top-secret LEGO(R) Hero Factory theme will launch in 2013! The adventures continue in these original stories featuring Stormer, Bulk, Surge, Core Hunter, and many more!