Martian Conspiracy - Shelagh Moore - Bog

A story about the threat to a Mars colony when criminals try to steal a top-secret package from the secure cargo bay. They areseen by Shardha, Rohan and Etsuka - triplets who are exploring the bay and who follow the thieves to their hideaway shell. Two of the triplets are kidnapped, their rescue leads to the thieves being caught and Mars is saved by the intrepid triplets and their older cousin Sofia's courage and cunning.