When her eccentric friend Dr. Reit invents an amazing transport into other worlds, Sheila McCarthy accidentally falls through the portal into the kingdom of Arren. There, Sheila finds herself part of a band of warrior-women. Astride unicorns, they gallop toward a dazzling city made of marble. But will they arrive in time to stop the evil king and his wicked wizard henchman from carrying out their deadly plans? And will Sheila ever be able to return home?

Thus begins the spellbinding story of an ordinary teenager trapped in an...