Best-selling author Rick Riordan presents a third space opera starring Korean animal spirits by Yoon Ha Lee, author of Dragon Pearl. While on a mission to cement peace between the Sun Clans and the Thousand Worlds, Min the fox spirit and her ghost brother Jun get stranded on a death planet with Haneul the dragon spirit and Sebin the tiger spirit. To survive, the young cadets will have to rely on all their wits, training, and supernatural abilities. And let's not forget the Dragon Pearl . . . This thrilling conclusion of the Thousand Worlds trilogy, told in alternating points of view, will put you under a delightful spell as it transports you to worlds full of both danger and wonder.