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They're the guardians of the Solar System and Earth's first line of defence. But now the agents of the Space Security Service face their greatest ever threat...

1.1 The Voord in London by LR Hay 1980s London. WDC Ann Kelso is assigned to CID, helping to clean up the streets. But 'Ann' is really SSS Agent Anya Kingdom from the 41st century, on a top-secret mission to track down aliens hiding in the past. But then she finds a different group of aliens hiding in the Thames - with very deadly intentions...

1.2 The Thal from G.R.A.C.E. by Felicia Barker As their investigations continue, SSS agents Anya Kingdom and Mark Seven journey to a planet colonised by Thals. They're in pursuit of a Thal scientist who has perfected an experimental new weapon... but soon they are the targets...

1.3 Allegiance by Angus Dunican The lush planet Hathra and its capital-moon Othrys are on the cusp of civil war. SSS agents Anya Kingdom and Mark Seven are meant to keep a low profile while on a diplomatic mission there. But when a pregnant surrogate for the Othryn royal family desperately asks for their help, they're unable to refuse...