There are 2 books in the The Unseen World series. The newest book is A Sleight of Shadows which came out in 2023.

1
An Unkindness of Magicians

Book cover of An Unkindness of Magicians
"A remarkable writer." -Neil Gaiman, bestselling author of American Gods

An Alex Award Winner

There is a dark secret that is hiding at the heart of New York City and diminishing the city's magicians' power in this fantasy thriller by acclaimed author Kat Howard.

In New York City, magic controls…
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2
A Sleight of Shadows

Book cover of A Sleight of Shadows
Return to Kat Howard's Alex Award-winning world begun in An Unkindness of Magicians, a secret society of power-hungry magicians in New York City.

After taking down the source of the corruption of the Unseen World, Sydney is left with almost no magical ability. Feeling estranged from herself, she is determined…