Equilibrium (Portal Chronicles #2)

It's not every day you see a naked body slumped by the side of the road...

This ominous sight is just the beginning of a mystery that will span two dimensions.

When California teen Arizona Darley and her siblings go missing, their mother, Dr. Olivia Darley, discovers that the time-travel portal she invented has been hijacked.

Is the hijacker responsible for the disappearance of her children? Have the children been transported to another dimension? If so, the police and FBI will never be able to find them, and Olivia must find a way to rescue her children on her own.

How will she do this without access to the portal?
From the back cover of ISBN 0615376819 / 9780615376813