Stronghold Rising (Sholan Alliance Novels)

The catlike aliens return--in the sixth exciting novel in Lisanne Norman's best-selling Sholan Alliance series.... Delicate negotiations for an alliance are underway with the Primes, a previously unknown faction of the hated Valytegan race. But the Sholans and Humans must avert a full-fledged rebellion--begun in a laboratory engaged in illegal breeding experiments...