The setting of this book is truly original. Mesklin, a supergiant planet with a very heavy gravity, rotating so fast that the centripetal force almost equates the gravity near the equator, where the weight is "only" three or four times that we experience on our green earth. In the polar regions, however, the centripetal force is reduced to almost nothing, and thus the gravity strikes at full 700g.
Surprisingly enough the planet supports intelligent life. The Mesklenites are truly amazing beings and you'll love them. Even if you do not love insects as a rule.