Breaking strain

From back cover of Avon paperback November 1987: Her code name is Sparta. Her beauty veils a mysterious past and abilities of superhuman dimension, the product of advanced biotechnology. When the injured freighter Star Queen arrives at Venus Station with a lone survivor on board, Sparta must risk her life to investigate what really happened during its deadly voyage in space. She must solve this mystery even as she unlocks another -- the truth behind her own identity...