Shannon Messenger is an American author recognized for her popular fantasy series aimed at younger readers. Her middle-grade series, "Keeper of the Lost Cities," has achieved significant success, appearing on The New York Times Best Seller list and drawing large crowds for promotional events. This series, which follows the journey of Sophie Foster, a young elf discovering her place in a hidden world, has spanned multiple books and is slated to conclude with a tenth installment. Messenger also penned the young adult "Sky Fall" series, focusing on a protagonist who learns he is a sylph, a wind spirit. Her books have been published by Simon & Schuster, and adaptations of her work are in development for film and television. Messenger was born in Southern California and graduated from the University of Southern California School of Cinematic Arts. She has two children.

The "Keeper of the Lost Cities" is an upper-middle-grade fantasy series that has garnered widespread acclaim, consistently appearing on The New York Times Best Seller list. The narrative centers on Sophie Foster, a twelve-year-old who discovers she is an elf and must leave her human life to reside in hidden elven cities. She attends an elven academy and uncovers secrets about her past, including a conspiracy involving a rebel group and a criminal organization. The series explores themes of identity, belonging, and hidden powers, featuring a cast of elves and other fantasy creatures. The first book was recognized as a recommended read for tweens in 2013. The series has expanded to include numerous books, short stories, and special editions, with planned future installments and an eventual conclusion. The books have been praised for their imaginative worlds and characters, though some reviews have noted pacing issues. An adaptation of the series for film is in development, with Warner Bros. Entertainment Inc. acquiring the rights.

Shannon Messenger is also the author of the young adult fantasy trilogy, "Sky Fall." This series introduces readers to Vane Weston, a seventeen-year-old who discovers he is a sylph, a type of wind spirit. The plot follows Vane as he navigates his destiny, which includes a betrothal and a forbidden romance, all while wielding his unique powers to confront an antagonist named Raiden. The series explores themes of destiny, love, and the struggle against powerful forces. The trilogy consists of "Let the Sky Fall," "Let the Storm Break," and "Let the Wind Rise." While reviews for this series have varied, some critics have highlighted the character development and the imaginative world-building, particularly concerning the wind spirits and their abilities.