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

Tasked with training the magical alicorn so that it can be revealed to the people of the lost cities as a sign of hope, Sophie is dismayed by a renewal of the dangers she believed were past, forcing her to risk her life for answers. Book #2.

Sophie's talents are getting stronger and, with the elusive Black Swan group ignoring her calls for help, she is determined to find her kidnappers, but a daring mistake pushes her world to the edge of war, and soon she has exposed a major conspiracy that could threaten all she loves.

A New York Times bestselling series
A USA TODAY bestselling series
A California Young Reader Medal–winning series

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.
Sophie Foster is on the run—but at least she's not alone.

Her closest friends from the Lost...

Sophie Foster is back in the Lost Cities--but the Lost Cities have changed. The threat of war hangs heavy over her glittering world, and the Neverseen are wreaking havoc. The lines between friend and enemy have blurred, and Sophie is unsure whom to trust. But when she's warned that the people she loves most will be the next victims, she knows she has to act. Betrayed by one of their closest allies, Sophie s whole word has been turned inside out....

A New York Times bestselling series
A USA TODAY bestselling series
A California Young Reader Medal–winning series

In this unforgettable seventh book in the Keeper of the Lost Cities series, Sophie must let the past and present blur together, because the deadliest secrets are always the ones that get erased.
Sophie Foster doesn't know what—or whom—to believe. And in a game...

"Sophie must uncover the truth about the Lost Cities' insidious past, before it repeats itself and changes reality."

Illusions shatter—and Sophie and her friends face impossible choices—in this astonishing eighth book in the New York Times and USA TODAY bestselling Keeper of the Lost Cities series.
Sophie Foster wants answers. But after a lifetime of lies, sometimes the truth is the most dangerous discovery. Even the smallest secret comes with terrifying new responsibilities.

And Sophie's not the only one with blank spots...

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. Keeper...