Book 4 "COUNTDOWN TO MIDNIGHT"

I read "COUNTDOWN TO MIDNIGHT"

Joe Carter have lived in Australia for a year.
He will spend first hot Christmas in Australia.
His father is a professer at Satellite For Communication (SFC).
One day, Professer Carter was kidnapped.
The criminal was his assistant, Dr. Kerr.
Dr. Kerr want to get computer codes
and start a war in the space.
Joe went to Kerr's safe house to help his father.
After run away from the house,
Joe and his father tried to stop Dr. Kerr.
They send a signal that broke SFC's satellite.
The satellite stopped.
They could interrupt Kerr's project.