Kendra and Seth ask the Giant Queen for help in this fourth novel of the New York Times bestselling sequel series to Fablehaven from author Brandon Mull. Kendra and Seth leave the underwater dragon preserve of Crescent Lagoon for a gladiator-style arena at Titan Valley in search for reinforcements in their war. In the magical realm of towering giants and enslaved dragons, will Kendra and Seth be able to convince the Giant Queen to be their ally?.