Astrosaurs．The Seas of Doom Astrosaurs．[3]，The seas of doom Astrosaurs．The Skies of Fear Astrosaurs．The Claws of Christmas Astrosaurs．[15]，The dreams of dread Astrosaurs．The Planet of Peril Astrosaurs．[5]，The skies of fear Other title:The seas of doom The seas of doom Astrosaurs．[17]，The twist of time