A Darker Shade of Magic (Shades of Magic, #1)

by V.E. Schwab

Kell wore a very peculiar coat. It had neither one side, which would be conventional, nor two, which would be unexpected, but several, which was, of course, impossible.

More than any other detail in the series, readers ask me about the inspiration for Kell's coat. The truth? It's my nod to Harry Potter--specifically the Room of Requirement.