Ifloat, i don't sink
i'm always on the go.
i travel the world, but i always return home.
i appreciate the silence when
but there's nothing like my city sounds, and
country views..
to keep me a float.

what am i?

options:

an airplane
a postage stamp
a boat

A: An airplane

Explanation:

 An airpane flies, which is floating in the air; but it can float also float in the water (at least for some time, but a boat can also sink). It is always taking off (travelling the world) and landing (but always returning home.) It is very silent up there in the clouds. Airports, near the cities are full of sounds, and the country views can be appreciated only from above, not from the sea.

a lot

explanation:

from the excerpt from the "the dark game" the reader can infer that folke cronholm was spying for the allied nations.