From the Inside Flap
For a profit -- and adventure -- Barlennan would sail thousands of miles across uncharted waters, into regions where gravity itself played strange tricks. He would dare the perils of strange tribes and stranger creatures -- even dicker with those strange aliens from beyond the skies, though the concept of another world was unknown to the inhabitants of the disk-shaped planet of Mesklin.
But in spite of the incredible technology of the strangers and without regard for their enormous size, Barlennan had the notion of turning the deal to an unsuspected advantage for himself . . . all in all a considerable enterprise for a being very much resembling a fifteen-inch caterpillar!
This book also contains Hal Clement's classic article "Whiligig World."
About the Author
Hal Clement was born in 1922, graduated from Harvard and holds degrees in astronomy, chemistry and education. A former B-24 pilot, he has worked for most of his life as a high-school science teacher. He gained his reputation as an sf writer in Astounding, and Mission of Gravity first appeared there in 1953.