Eking out a desperate existence as a renegade with the other Portkids who hide in the old tunnels under a spaceport on Mars, the teenager known as Streak stumbles on clues to the sabotage plaguing the entire solar system.
I read this book ages ago when I was about 12 years old. It was my first taste of Sci-fi and what a glorious taste it was! I need to find a copy of this so I can give it a re-read.