Another book in the Pern series, this one exploring the dolphins that apparently accompanied the original settlers to Pern and who still remember the traditions of helping the humans, even though the humans have forgotten. In this novel, with help from the records recovered from AIVAS, young Readis gets reacquainted with the dolphins and resolves to restart the Dolphineer mastery.

It's a cute story and another tale of Pern - and a retelling of the colonization of Pern from another point of view - but it doesn't really make a lot of sense in some places and hastily glosses over details in others. For example, it doesn't make sense how violently and irrationally negative Readis's mother is about the dolphins. There's a whole subplot with Toric that seems irrelevant and doesn't really go anywhere. Readis runs off and finds a nice cave and somehow that makes it make sense for everyone to declare him the new craftmaster of Dolphineering? Etc etc ... fills in a few interesting corners of the story of Pern but doesn't bear to examine the plot or details too closely.