At age 12, Sophie learns that the remarkable abilities that have always caused her to stand out identify her as an elf. After being brought to Eternalia to hone her skills, she discovers that she has secrets buried in her memory for which some would kill.

In this stunning ninth book in the New York Times and USA TODAY bestselling Keeper of the Lost Cities series, Sophie and her friends discover the true meaning of power—and evil. Sophie Foster changed the game. Now she’s facing impossible choices: When to act. When to trust. When to let go. Her friends are divided and scattered, and the Black Swan wants Sophie to focus on their projects. But her instincts are leading her somewhere else. Stellarlune—and the mysterious Elysian—might be the key to everything. But finding truth in the Lost Cities always requires sacrifice. And as the Neverseen’s plans sharpen into terrifying focus, it appears that everyone has miscalculated. The Lost Cities’ greatest lie could destroy everything. And in the battle that follows, only one thing is certain: nothing will ever be the same.

Sophie befriends the mythical AlicornNand puts her mysterious powers to the testNin this sequel to "Keeper of the Lost Cities."

Book 8.5 in the New York Times and USA TODAY bestselling Keeper of the Lost Cities series delivers what fans of the series have been begging for! Told in an exciting new way, the saga continues with plenty of huge reveals and shocking new twists—plus a complete series guide with beautiful black-and-white illustrations and other awesome bonuses! In this extra special installment of the Keeper of the Lost Cities series, the story picks up right from Legacy’s particularly devastating cliffhanger. But chapters alternate between Sophie and Keefe’s perspectives to give readers deeper insights into both beloved characters. New powers will be discovered. Hard truths from the past will come to light. And all of your favorite characters will find themselves tested in ways they never imagined. And that’s not all! Unlocked also includes a comprehensive guide to the world of the Lost Cities, featuring new character and world details that have never been revealed before—plus fun bonuses like Keeper-themed recipes, a detailed map of the Lost Cities, gorgeous illustrations, and so much more!

A New York Times bestselling series A USA TODAY bestselling series A California Young Reader Medal–winning series Sophie uncovers shocking secrets—and faces treacherous new enemies—in this electrifying third book in the Keeper of the Lost Cities series. Sophie Foster is ready to fight back. Her talents are getting stronger, and with the elusive Black Swan group ignoring her calls for help, she’s determined to find her kidnappers—before they come after her again. But a daring mistake leaves her world teetering on the edge of war, and causes many to fear that she has finally gone too far. And the deeper Sophie searches, the farther the conspiracy stretches, proving that her most dangerous enemy might be closer than she realizes. In this nail-biting third book in the Keeper of the Lost Cities series, Sophie must fight the flames of rebellion, before they destroy everyone and everything she loves.

A New York Times bestselling series A USA TODAY bestselling series A California Young Reader Medal–winning series Sophie and her friends face battles unlike anything they’ve seen before in this thrilling sixth book of the Keeper of the Lost Cities series. Sophie Foster is struggling. Grieving. Scrambling. But she knows one thing: she will not be defeated. The Neverseen have had their victories—but the battle is far from over. It’s time to change tactics. Make sacrifices. Reexamine everything. Maybe even time for Sophie to trust her enemies. All paths lead to Nightfall—an ominous door to an even more ominous place—and Sophie and her friends strike a dangerous bargain to get there. But nothing can prepare them for what they discover. The problems they’re facing stretch deep into their history. And with time running out, and mistakes catching up with them, Sophie and her allies must join forces in ways they never have before. In this spectacular sixth book in the New York Times and USA TODAY bestselling Keeper of the Lost Cities series, Sophie must uncover the truth about the Lost Cities’ insidious past, before it repeats itself and changes reality.

Sophie battles the rebels -- and recovers dark memories from her past -- in this jaw-dropping fourth book in the bestselling Keeper of the Lost Cities series.