Nightfall (Audible Audio Edition): Shannon Messenger, Caitlin Kelly, Audible Studios

The Keeper of the Lost Cities series is a thrilling and action-packed adventure that will keep you on the edge of your seat from start to finish.

With six books in the series, there's never been a better time to get hooked on this New York Times and USA Today best-selling series.

Sophie Foster and her friends face battles unlike anything they've seen before as they uncover the truth about their world's insidious past and work to change its course.

With heart-pumping action, memorable characters, and a gripping storyline that will keep you guessing until the very end, this series is not to be missed.

So why wait? Dive into the Keeper of the Lost Cities series today and discover the magic for yourself!