Freedom's Ransom is the fourth novel in Anne McCaffrey's Freedom series, also known as the Catteni Sequence. The sequel to Freedom's Landing, Freedom's Choice, and Freedom's Challenge, Freedom's Ransom will please some fans of this star-spanning science fiction series, but others will find the book slow-paced, talky, and lacking in action. Freedom's Ransom ends conclusively, with no major unresolved plot lines, yet leaves space for at least one sequel.      

  The planet Botany was settled by a mixed group of humans and aliens, slaves of the alien Catteni and their alien masters, the Eosi. But one Catteni was dropped on Botany with the slaves: Zainal, who helped them win their independence. Now Botany must establish trade with other planets in order to survive. But the other worlds have been ravaged by the Catteni, and once-proud Earth has been reduced to primitive poverty, its technology stolen by corrupt Barevi merchants. To save Botany, Zainal and Kris Bjornsen, his human lover, must find a way to help all the worlds.