Key Out of Time
by Andre Norton

Popularity 32
Time Agents Ross Murdock and Gordon Ashe, aided by a Polynesian girl and her team of telephatic 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 mist have destroyed the planet.
Juvenile fictionFictionTime travelKerara Trehern (Fictitious character)Travis Fox (Fictitious character)Gordon Ashe (Fictitious character)Science fictionRoss Murdock (Fictitious character)Fiction, science fiction, generalChildren's fictionTime travel, fictionAmerican Science fiction