In one day, the ISS orbits the Earth 16 times. Orbital comprises of 16 chapters, one for each orbit, as the station passes countries and oceans, a typhoon in the south Pacific, and the astronauts go about their daily tasks. I don't think it's explicitly stated that this is set on the ISS but there's plenty of clues. There's not much plot, not much happens on a regular day in space after all, but there are some beautiful observations of the planet, musings on humanity and a smattering of science.