David Orme 
Ultimate Secret 

The Starchasers discover Suma’s home planet…well, what’s left of it. The uninhabited planet lies in ruins, but why? They’re close to finding out when they discover they’ve been beaten to it by some very ugly aliens with big weapons! Rounded up inside a secret vault, the history of Suma’s people and what became of their planet finally becomes clear. Can the Starchasers escape the clutches of these angry aliens? And will Suma ever forgive them for what they did?