The Secret Chapter; The Invisible Library series - paperback, 1529000572, Cogman

The Invisible Library (The Invisible Library Novel) - Paperback - VERY GOOD

The Invisible Library (The Invisible Library Series) - Paperback - GOOD

The Secret Room #5 (The Haunted Library) - Paperback - VERY GOOD

The Secret Chapter (The Invisible Library series)

The Dark Archive (The Invisible Library Novel) - Paperback - VERY GOOD

The Lost Plot (The Invisible Library Novel) - Paperback - VERY GOOD

The Secret Chapter (The Invisible Library series), Cogman, Genevieve, Very Good