Key Out of Time - Andre Norton - Bog

Time Agents Ross Murdock and Gordon Ashe, aided by a Polynesian girl and her team of telepathic dolphins, probe the mystery of the sea-planet men have named Hawaika. Its cities and civilizations have vanished, but our agents are snatched back through a Time Gate and marooned in the midst of the struggle for power that must have destroyed the planet. "The sweep of imagination and brilliance of detail in the author's previous space-time novels, render Andre Norton a primary talent among writers of science fiction" - Virginia Kirkus. This adventure in the watery, grotesque world of Hawaika is further evidence of the author's mastery.