When Emerson Blackwell discovers a secret library in New York City where the books are doorways into magical worlds, it seems like she's found the perfect adventure. But as Emerson begins to explore the Catalogue, she is drawn into a world filled with secrets and more questions than answers.



Eight years ago, Emerson Blackwell's mother died in a tragic fire and she booked a one-way ticket to New York City to escape her grief. But the trauma of her past comes rushing back when she uncovers a Library in the heart of the city where the books are doorways to magical worlds. However, The Central Library responsible for publishing books in the Catalogue is banning books and hunting down authors that The Central Library claims are dangerous. When Emerson finds out her mother is alive and publishing banned books, the question arises—are these books dangerous? Or is The Central Library hiding something?



As Emerson becomes entangled in a web of secrets, political rivalries, and conspiracies, she rekindles a romance with her first love, who is secretly working with her mother against The Central Library. However, tensions rise when Emerson finds herself drawn to the son of The Central Library's Head Librarian—her mother's greatest enemy.