Solar Colonies Series by Ken Catran

"As the firestorms rage overhead, Jily and her two companions must fight for their lives, because Venus has a terrible secret as old as time itself. And time is running out."

Following "Doomfire on Venus," this book tells of danger and intrigue on Neptune's icy moon, Triton.Dex must clear his name. A routine mining exploration has ended in tragedy - and Dex has been blamed.But who will believe him?The answer lies on Triton, millions of kilometres away. But first Dex must overcome the hatred of the shuttle crew that takes him there. Then he must face an alien puzzle too terrifying to imagine

Cela, a Marian colonist is kidnapped and taken to Earth.Telesforo, and Earth-boy on an urgent mission, crash-lands on Mars.Now both teenagers are being stalked by an unknown killer.One thing links them. Something that will wake horrors long since forgotten. Something that will change the solar system.