Felidae: Mu Rising: Jeff Johnston

Kian Praty and his fellow astronauts are home, but find they miss the adventure. Researching the Agroterra (Time of Chaos) Files, Kian starts looking for the mythical land of Lemuria - an ancient advanced civilization that sank beneath the waves 300 years before. Aided by an unlikely source,- his boss Sudice Cosmonov, they set off on a voyage of discovery and uncover more than they anticipated.