Andre Norton 
Key Out of Time [EPUB ebook] 

There was a shading of rose in the pearl arch of sky, deepening at the horizon meeting of sea and air in a rainbow tint of cloud. The lazy swells of the ocean held the same soft color, darkened with crimson veins where spirals of weed drifted. A rose world bathed in soft sunlight, knowing only gentle winds, peace, and—sloth. Ross Murdock leaned forward over the edge of the rock ledge to peer down at a beach of fine sand, pale pink sand with here and there a glitter of a crystalline "shell"—or were those delicate, fluted ovals shells? Even the waves came in languidly. And the breeze which ruffled his hair, smoothed about his sun-browned, half-bare body, caressed it, did not buffet on its way inland to stir the growths which the Terran settlers called "trees" but which possessed long lacy fronds instead of true branches.