J.K. Rowling gets many, many messages from fans. But a particularly personal one got her attention on March 19.

"Dragging myself through another bout of severe depression and re-reading the 'Harry Potter' series to strengthen my Patronus," the fan wrote on Twitter, referencing the mystical, protective force that plays a key role in the series. "A million thanks to J.K. Rowling for the magical escape that's always there when it's needed."

Rowling, who often enjoys engaging readers online, was moved to reply.

Photo by John Phillips/Getty Images.

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