Title: The fortress of the treasure queen
First published: 2004
Description: Ko is back in power -- and nothing in Droon is safe! His beasts have found a lightning-powered submarine hidden in the secret Fortress of the Treasure Queen. Now Eric and his friends have to stop Ko before he destroys Jaffa City. But first they'll need help from their worst enemy -- Lord Sparr. If he can be trusted.
Subjects: Droon (Imaginary place), Fiction, Fantasy, Juvenile fiction, Magic
LC classification: CPB Box no. 2266 vol. 5