The Traveler by John Twelve Hawks

Every time you make a call on your cell phone or use your ATM card or register for something on a computer, you are leaving an electronic footprint. People knowledgable of computer programming can gather information on you and there is the potential to use that information against you. John Twelve Hawks calls this process of leaving an electronic record "living on the grid"

In the very near future, society is monitored and controlled by a secret society called the Tabula. The only people the Tabula cannot control are Travelers, who have the ability to move into other realms and see clearly the manipulation of free will by the Tabula. Travelers are very carefull not to live on the grid. Tabula's mission is to locate and destroy all the Travelers, ensuring their ability to continue controlling society. Between them and success stand the Harlequins, trained from birth to protect the travelers. And Maya, who never wanted to be a Harlequin, finds herself in a life and death struggle to save one of the last Travelers from extinction.