Calamity has befallen the city of Quentaris! Due to a vengeful plot by warlike Tolrush (which backfires), Quentaris is uprooted—city, cliff-face, harbour and all—and hurled into the uncharted rift-maze. Lost and adrift in this endless labyrinth of parallel universes, encountering both friend and foe and facing unknown dangers, Quentaris must somehow forge a new identity and find its way home.

The Equen Queen is the second book in the highly successful Quentaris - Quest of the Lost City and is the sequel to The Spell of Undoing by Paul Collins. While moored to a new world Quentaris is approached by another sky-city. The sky-traders on board seem friendly and generous, offering the Quentarans food and gems, but are in fact setting a trap for Quentaris. What are the equens and can they really heal the sick? Despite losing her special powers, Tab Vidler must find some answers fast, before all is lost.

Much has changed in the sky-city of Quentaris. With the Archon dead, dark forces have come into play. New faces are appearing, familiar ones vanishing, and the horrid Florian has claimed the throne. Then, as Quentaris slips quietly through a vortex into the watery world of the Yarka, Tab Vidler and her friends suddenly realize they are the city's only hope. Plots, intrigue, magic, mystery, high adventure and more - everything that you've come to expect from the Quentaris series!