Books in the The Twins Of Petaybee series

The Shongili twins, Ronan and Murel, accompany their friend Marmie on her luxury space craft Piaf to rescue their friend Ke-ola's family from an uninhabitable planet.

In Deluge the selkie twins, Ronan and Murel, leave Petaybee on a mission to help rescue their friend Marmie, who has been falsely arrested on the orders of a corrupt Colonel.

In Powers That Be, Power Lines and Power Play bestselling authors Anne McCaffrey and Elizabeth Ann Scarborough told the story of a sentient planet, Petaybee.