The first humans to arrive on the beautiful, unspoiled planet of Doona drew up an intricate cohabitation contract with the alien, cat-like Hrrubans, who had set... » 

The first humans to arrive on the beautiful, unspoiled planet of Doona drew up an intricate cohabitation contract with the alien, cat-like Hrrubans, who had settled there first. Now, after 25 years, the contract is due for renewal. Anne McCaffrey is a past winner of both the Hugo and Nebula awards. «