What you can't see
can hurt you!
Just as their father takes on a new job, twins Zack and Zana learn that they are Shadow Jumpers, chosen to defend Earth from a powerful and evil being known as OBSIDIAN. He lurks inside the dark side of the moon, sending his SHADOW RIPPERS to possess human life forms to wage his war and impose total submission from our planet.
As Obsidian's plot escalates, Zack and Zana must keep their mission and newfound powers a secret from everyone, especially their father, the President of the United States. Only their Grandmother knows, and if discovered, disaster with a capital "D" can engulf the entire world. Talk about pressure! As if being a teenager wasn't hard enough.
Twin Forces Unite!